ASP.NET tutorial Guide

This complete ASP & ASP.NET tutorial covers 247 topics — from Classic ASP on IIS through Web Forms, MVC, ASP.NET Core, Web API, EF Core, security, and a production-ready final Core application. Each topic below links to a dedicated post with examples.

Course roadmap

1. Introduction to ASP

Classic ASP (Active Server Pages) runs VBScript/JScript on IIS to build dynamic websites. This track covers IIS setup, Request/Response, ADO, and a classic ASP project before moving to ASP.NET. Read full topic.

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2. What is Classic ASP?

ASP pages mix HTML with <% %> script blocks executed on the server before HTML is sent to the browser. Read full topic.

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3. ASP vs ASP.NET

ASP.NET adds a managed runtime, stronger typing (C#/VB.NET), and modern patterns (MVC/Core). Read full topic.

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4. Installing IIS

Turn on IIS and the ASP feature under Application Development. Read full topic.

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5. Setting Up Classic ASP

Set default documents (default.asp) and script permissions carefully. Read full topic.

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6. First ASP Application

Browse via http://localhost/… and confirm server execution (not raw script). Read full topic.

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7. ASP Page Structure

Keep business logic above markup or in includes. Read full topic.

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8. VBScript Basics

Case-insensitive language with Dim, Set, and late binding. Read full topic.

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9. Variables and Data Types in Classic ASP

Use Option Explicit to catch typos. Read full topic.

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10. Operators in Classic ASP

& concatenates strings; + can coerce numbers. Read full topic.

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11. Conditional Statements in Classic ASP

End If / End Select close blocks. Read full topic.

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12. Loops in Classic ASP

Avoid unbounded loops on request threads. Read full topic.

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13. Functions and Procedures in Classic ASP

Prefer includes for shared helpers. Read full topic.

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14. Request Object in Classic ASP

Never trust client input — validate before use/SQL. Read full topic.

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15. Response Object in Classic ASP

Response.Redirect for navigation; Response.End to stop. Read full topic.

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16. Server Object in Classic ASP

HTMLEncode helps reduce XSS when echoing user data. Read full topic.

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17. Session Object in Classic ASP

Session consumes server memory — store IDs, not huge objects. Read full topic.

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18. Application Object in Classic ASP

Use for counters/config — not per-user secrets. Read full topic.

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19. Cookies in Classic ASP

Set Expires and Secure flags thoughtfully; prefer sessions for auth. Read full topic.

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20. Query String in Classic ASP

Validate IDs; don’t put secrets in query strings. Read full topic.

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21. Form Data in Classic ASP

Match method="post" for sensitive data. Read full topic.

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22. Form Validation in Classic ASP

Always validate again on the server — client checks are optional UX. Read full topic.

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23. File Handling in Classic ASP

Restrict paths; never take raw user paths without allowlisting. Read full topic.

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24. Error Handling in Classic ASP

Log errors; don’t show stack details to users. Read full topic.

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25. Database Connectivity in Classic ASP

Prefer parameterized commands to reduce SQL injection risk. Read full topic.

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26. ADO Introduction

Connection, Command, and Recordset are the core objects. Read full topic.

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27. Connecting ASP with SQL Server

Store connection strings outside public web root when possible. Read full topic.

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28. CRUD Operations in Classic ASP

Use parameters for all user-supplied values. Read full topic.

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29. SQL Queries in ASP

Never concatenate raw user input into SQL strings. Read full topic.

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30. Authentication and Login in Classic ASP

Hash passwords (modern apps); never store plain text. Read full topic.

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31. User Sessions in Classic ASP

Abandon session on logout; set timeouts appropriately. Read full topic.

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32. Email Sending in Classic ASP

Relay restrictions and SPF/DKIM matter in production. Read full topic.

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33. File Upload in Classic ASP

Validate type/size; store outside executable paths. Read full topic.

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34. ASP Security Best Practices

Disable unnecessary IIS features; keep patches current. Read full topic.

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35. ASP Performance Optimization

Avoid huge includes on every request. Read full topic.

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36. Classic ASP Debugging

Check IIS logs and Failed Request Tracing. Read full topic.

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37. Classic ASP Project

Include parameterized SQL and basic validation. Read full topic.

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38. Introduction to ASP.NET

ASP.NET is Microsoft’s web stack on the .NET platform for building sites and APIs. Read full topic.

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39. What is ASP.NET?

Today “ASP.NET” usually means ASP.NET Core for new development. Read full topic.

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40. ASP.NET Architecture

Core uses middleware pipeline; Framework Web Forms uses page lifecycle. Read full topic.

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41. ASP.NET vs ASP.NET Core

Core is the future — faster, cross-platform, modern DI/middleware. Read full topic.

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42. ASP.NET vs PHP

Both can build great web apps — choose by ecosystem and team skills. Read full topic.

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43. Installing Visual Studio

VS Code + .NET SDK is a lighter alternative. Read full topic.

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44. Installing .NET SDK

Verify with dotnet –info. Read full topic.

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45. Creating Your First ASP.NET Project

Run and browse the HTTPS development endpoint. Read full topic.

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46. ASP.NET Project Structure

SDK-style projects keep structure lean. Read full topic.

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47. .NET CLI

Templates unlock web, api, mvc, and classlib projects. Read full topic.

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48. C# Fundamentals for ASP.NET

ASP.NET Core APIs are async-friendly — learn Task/await early. Read full topic.

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49. Variables and Data Types in C#

Prefer var only when the type is obvious. Read full topic.

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50. Conditions and Loops in C#

foreach is idiomatic for collections. Read full topic.

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51. Methods in C#

Expression-bodied members keep simple methods short. Read full topic.

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52. Classes and Objects in C#

Records suit immutable DTOs. Read full topic.

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53. OOP in C#

Prefer composition and interfaces for testability in web apps. Read full topic.

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54. Exception Handling in C#

Don’t swallow exceptions silently in web request paths. Read full topic.

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55. Introduction to Web Forms

Web Forms is legacy for new apps but common in existing enterprise systems. Read full topic.

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56. Web Forms Project Structure

Web.config holds connection strings and auth settings. Read full topic.

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57. Page Lifecycle in Web Forms

Know IsPostBack to avoid resetting state on every post. Read full topic.

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58. Server Controls in Web Forms

Controls raise server events and can bind data. Read full topic.

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59. HTML Controls in Web Forms

Prefer asp:* server controls when you need richer behavior. Read full topic.

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60. TextBox Control in Web Forms

Read Text in click handlers after postback. Read full topic.

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61. Label Control in Web Forms

Use Literal for markup without extra span when needed. Read full topic.

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62. Button Control in Web Forms

Use CausesValidation and ValidationGroup as needed. Read full topic.

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63. DropDownList Control in Web Forms

AppendDataBoundItems + empty item for “please select”. Read full topic.

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64. CheckBox Control in Web Forms

CheckBoxList for multi-select sets. Read full topic.

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65. RadioButton Control in Web Forms

RadioButtonList simplifies bound option lists. Read full topic.

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66. GridView Control in Web Forms

Prefer strongly typed models and parameterized data access. Read full topic.

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67. Repeater Control in Web Forms

Lighter than GridView when you don’t need built-in editing UI. Read full topic.

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68. DataList Control in Web Forms

Less common today — Repeater/ListView often preferred. Read full topic.

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69. Form Validation Controls in Web Forms

Enable client + server validation; always validate server-side. Read full topic.

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70. Master Pages in Web Forms

Content pages fill placeholders via MasterPageFile. Read full topic.

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71. User Controls in Web Forms

Expose properties for parent pages to configure. Read full topic.

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72. State Management in Web Forms

Minimize ViewState size on heavy pages. Read full topic.

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73. ViewState in Web Forms

Disable ViewState on controls that don’t need it. Read full topic.

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74. Session State in Web Forms

Prefer storing IDs; support out-of-process session in web farms. Read full topic.

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75. Application State in Web Forms

Often replaced by Cache for expiration-friendly data. Read full topic.

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76. Cookies in Web Forms

Use HttpOnly and Secure for sensitive cookies. Read full topic.

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77. Authentication in Web Forms

Migrate mindset toward ASP.NET Identity on newer stacks. Read full topic.

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78. Authorization in Web Forms

Combine with roles for finer control. Read full topic.

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79. Membership and Roles in Web Forms

Legacy providers — know them for maintenance; prefer Identity on Core. Read full topic.

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80. Web Forms with SQL Server

Prefer parameterized SqlCommand over string concatenation. Read full topic.

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81. ADO.NET in Web Forms

Using statements ensure connections close. Read full topic.

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82. CRUD Operations in Web Forms

Validate input and use transactions for multi-step updates. Read full topic.

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83. File Upload in Web Forms

Block executable extensions; store outside site root when possible. Read full topic.

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84. Email Integration in Web Forms

Configure SMTP in Web.config; handle failures gracefully. Read full topic.

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85. Web Forms Security

Enable request validation thoughtfully; still sanitize. Read full topic.

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86. Web Forms Deployment

Transform Web.config for environments. Read full topic.

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87. Introduction to ASP.NET MVC

MVC on .NET Framework paved the way for Core MVC patterns. Read full topic.

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88. MVC Architecture

Keep controllers thin; push logic to services. Read full topic.

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89. Models in ASP.NET MVC

Separate domain entities from UI view models when they diverge. Read full topic.

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90. Views in ASP.NET MVC

Strongly typed views with @model improve safety. Read full topic.

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91. Controllers in ASP.NET MVC

Name actions to match routes and views by convention. Read full topic.

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92. Routing in ASP.NET MVC

Default {controller}/{action}/{id} covers many apps. Read full topic.

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93. Action Methods in ASP.NET MVC

Use [HttpPost] for state-changing actions. Read full topic.

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94. Action Parameters in ASP.NET MVC

Complex types bind from form fields by name. Read full topic.

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95. ViewBag in ASP.NET MVC

Prefer view models over ViewBag for typed data. Read full topic.

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96. ViewData in ASP.NET MVC

Casting required — view models are safer. Read full topic.

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97. TempData in ASP.NET MVC

TempData often uses session under the hood. Read full topic.

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98. Razor Syntax in MVC

HTML encode by default with @value. Read full topic.

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99. Razor Views in MVC

@RenderBody and @section Scripts are common patterns. Read full topic.

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100. Partial Views in MVC

Pass a model to keep partials typed. Read full topic.

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101. Layout Pages in MVC

Set Layout in _ViewStart or per view. Read full topic.

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102. Model Binding in MVC

Include anti-forgery tokens on POSTed forms. Read full topic.

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103. Form Handling in MVC

Follow Post-Redirect-Get after successful saves. Read full topic.

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104. Form Validation in MVC

Display ValidationMessageFor / ValidationSummary. Read full topic.

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105. Data Annotations in MVC

Custom ValidationAttribute for domain rules. Read full topic.

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106. Entity Framework in MVC

DbContext + DbSet power LINQ queries. Read full topic.

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107. Database First with Entity Framework

Useful when DB is owned by another team/system. Read full topic.

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108. Code First with Entity Framework

Preferred when the app owns the database design. Read full topic.

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109. CRUD Operations in MVC

Scaffolding can generate a starting point — then harden it. Read full topic.

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110. Authentication in MVC

Challenge unauthenticated users to login. Read full topic.

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111. Authorization in MVC

Fail closed — deny by default on sensitive controllers. Read full topic.

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112. Role-Based Access in MVC

Keep role checks consistent in UI and server. Read full topic.

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113. Filters in MVC

Order matters when stacking filters. Read full topic.

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114. Custom Filters in MVC

Log timings or enforce custom headers. Read full topic.

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115. Dependency Injection in MVC

Framework MVC needs a DI container; Core has built-in DI. Read full topic.

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116. Areas in MVC

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117. AJAX with ASP.NET MVC

Validate anti-forgery on AJAX posts too. Read full topic.

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118. JSON Handling in MVC

Mind JSON max length and circular references. Read full topic.

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119. Web API Integration with MVC

Same solution can share services/DTOs. Read full topic.

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120. MVC Security

Keep secrets out of source control. Read full topic.

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121. MVC Performance Optimization

Profile before optimizing. Read full topic.

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122. Introduction to ASP.NET Core

ASP.NET Core is the recommended stack for new .NET web development. Read full topic.

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123. ASP.NET Core Architecture

Program.cs configures the host and request pipeline. Read full topic.

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124. ASP.NET Core Project Structure

Feature folders scale better than dumping everything in Controllers. Read full topic.

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125. .NET CLI Commands for ASP.NET Core

dotnet watch run speeds up local UI work. Read full topic.

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126. Middleware in ASP.NET Core

Order matters � exception handling and auth placement are critical. Read full topic.

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127. Request Pipeline in ASP.NET Core

Short-circuit when a component handles the response fully. Read full topic.

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128. Dependency Injection in ASP.NET Core

Inject via constructors; prefer interfaces. Read full topic.

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129. Configuration in ASP.NET Core

IOptions<T> binds strongly typed settings. Read full topic.

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130. appsettings.json in ASP.NET Core

Never commit passwords � use secrets/env/KeyVault. Read full topic.

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131. Environment Configuration in ASP.NET Core

ASPNETCORE_ENVIRONMENT selects the environment. Read full topic.

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132. Logging in ASP.NET Core

Avoid logging secrets or full personal data. Read full topic.

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133. Routing in ASP.NET Core

Minimal APIs use MapGet/MapPost style routing. Read full topic.

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134. Controllers in ASP.NET Core

Return IActionResult / ActionResult<T> for clarity. Read full topic.

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135. Razor Pages in ASP.NET Core

Great for form-heavy sites without full MVC ceremony. Read full topic.

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136. Razor Syntax in ASP.NET Core

Prefer Tag Helpers over Html helpers in Core. Read full topic.

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137. Model Binding in ASP.NET Core

[FromBody]/[FromQuery]/[FromRoute] clarify sources. Read full topic.

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138. Model Validation in ASP.NET Core

Return 400 with problem details for APIs. Read full topic.

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139. Tag Helpers in ASP.NET Core

Enable with @addTagHelper in _ViewImports. Read full topic.

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140. View Components in ASP.NET Core

Invoke from views with Component.InvokeAsync. Read full topic.

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141. Partial Views in ASP.NET Core

Pass a model for typed partials. Read full topic.

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142. Session Management in ASP.NET Core

Prefer distributed session store in multi-instance hosts. Read full topic.

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143. Cookies in ASP.NET Core

Auth cookies are usually managed by the auth middleware. Read full topic.

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144. Authentication in ASP.NET Core

UseAuthentication before UseAuthorization. Read full topic.

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145. Authorization in ASP.NET Core

Policy-based auth scales better than role checks alone. Read full topic.

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146. ASP.NET Core Identity

Scaffold Identity UI or build custom pages. Read full topic.

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147. JWT Authentication in ASP.NET Core

Prefer short-lived access tokens + refresh strategy. Read full topic.

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148. Role-Based Authorization in ASP.NET Core

Map roles into JWTs or Identity cookies consistently. Read full topic.

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149. Introduction to Web API

APIs power SPAs, mobile apps, and integrations. Read full topic.

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150. REST API Architecture

Consistency beats pedantic purity for most business APIs. Read full topic.

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151. Creating a Web API

Enable OpenAPI for interactive docs. Read full topic.

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152. HTTP Methods in Web API

Don�t use GET for state-changing operations. Read full topic.

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153. GET API in ASP.NET

Support filtering via query parameters. Read full topic.

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154. POST API in ASP.NET

Validate DTOs before insert. Read full topic.

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155. PUT API in ASP.NET

Return 404 if the target does not exist (or upsert by design). Read full topic.

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156. PATCH API in ASP.NET

Validate after applying the patch document. Read full topic.

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157. DELETE API in ASP.NET

Authorize destructive operations strictly. Read full topic.

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158. HTTP Status Codes in Web API

ProblemDetails standardizes error payloads. Read full topic.

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159. Routing and Attributes in Web API

Keep routes stable; version breaking changes. Read full topic.

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160. Request and Response Models in Web API

Don�t overexpose EF entities directly. Read full topic.

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161. DTOs in ASP.NET Web API

AutoMapper/Mapperly optional � explicit mapping is fine. Read full topic.

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162. JSON Serialization in ASP.NET

Be consistent with camelCase for JS clients. Read full topic.

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163. Entity Framework Core in Web API

Use async query APIs on request threads. Read full topic.

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164. Database Integration in Web API

Separate read/write concerns as the API grows. Read full topic.

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165. CRUD API in ASP.NET

Add pagination on list endpoints early. Read full topic.

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166. API Validation in ASP.NET

[ApiController] auto-returns 400 for invalid models. Read full topic.

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167. Exception Handling in Web API

Don�t leak stack traces to clients in production. Read full topic.

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168. Global Exception Handling in ASP.NET

One place for logging + ProblemDetails responses. Read full topic.

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169. API Authentication

Separate authn from authz clearly. Read full topic.

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170. JWT Tokens in Web API

Validate lifetime, issuer, audience, and signing key. Read full topic.

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171. API Authorization

Enforce authorization in the API � never trust the UI alone. Read full topic.

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172. CORS in ASP.NET

Avoid AllowAnyOrigin with credentials. Read full topic.

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173. API Versioning in ASP.NET

Document versions in OpenAPI. Read full topic.

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174. Pagination in ASP.NET APIs

Return total counts when clients need them. Read full topic.

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175. Filtering and Searching in ASP.NET APIs

Don�t accept raw OData-like expressions without care. Read full topic.

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176. Swagger / OpenAPI in ASP.NET

Add security schemes for bearer auth in Swagger UI. Read full topic.

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177. Postman API Testing

Store tokens in env vars; commit collection without secrets. Read full topic.

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178. API Security Best Practices

Least privilege on DB connections and secrets. Read full topic.

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179. API Performance Optimization

Use async IO and connection pooling. Read full topic.

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180. SQL Server Introduction

LocalDB/Express work for development; Standard/Enterprise for production scale. Read full topic.

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181. Database Design

Design for query patterns your app actually runs. Read full topic.

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182. Tables and Relationships

Junction tables implement many-to-many. Read full topic.

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183. Primary and Foreign Keys

Prefer surrogate int/guid keys unless natural keys are stable. Read full topic.

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184. SQL Queries

Keep queries readable; prefer set-based operations. Read full topic.

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185. SQL Joins

Know when EXISTS beats JOIN for existence checks. Read full topic.

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186. Stored Procedures

Call via ADO.NET/EF with parameters. Read full topic.

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187. SQL Views

Indexed views have extra constraints � know before using. Read full topic.

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188. Transactions

EF Core SaveChanges uses a transaction; TransactionScope for wider units. Read full topic.

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189. ADO.NET

Still useful for specialized SQL and performance-critical paths. Read full topic.

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190. Entity Framework Core

Providers exist for SQL Server, PostgreSQL, SQLite, and more. Read full topic.

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191. DbContext in EF Core

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192. DbSet in EF Core

Prefer LINQ over raw string SQL when possible. Read full topic.

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193. EF Core Migrations

Review generated migrations before applying to production. Read full topic.

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194. LINQ with EF Core

Avoid client evaluation surprises � check logs. Read full topic.

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195. CRUD with EF Core

Use AsNoTracking for read-only queries. Read full topic.

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196. Relationships in EF Core

Owned types and join entities cover advanced cases. Read full topic.

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197. Lazy and Eager Loading in EF Core

Explicit loading is a third option for selective fetches. Read full topic.

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198. Query Optimization with EF Core

Use compiled queries and split queries when helpful. Read full topic.

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199. Caching in ASP.NET

Choose memory vs distributed based on hosting topology. Read full topic.

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200. Response Caching in ASP.NET Core

Only cache safe idempotent GET responses. Read full topic.

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201. Memory Cache in ASP.NET Core

Not shared across servers � use distributed cache in farms. Read full topic.

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202. Distributed Cache in ASP.NET Core

Serialize values consistently. Read full topic.

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203. Redis with ASP.NET

Plan eviction and key naming prefixes per environment. Read full topic.

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204. Background Services in ASP.NET Core

Don�t block request threads with heavy jobs. Read full topic.

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205. Hosted Services in ASP.NET Core

Graceful shutdown via cancellation tokens. Read full topic.

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206. SignalR in ASP.NET Core

Scale out with Redis backplane when multi-server. Read full topic.

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207. Real-Time Applications with ASP.NET

Authenticate hub connections; authorize groups carefully. Read full topic.

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208. File Upload and Storage in ASP.NET

Scan/validate files; serve via controlled download endpoints. Read full topic.

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209. Email Services in ASP.NET

Queue emails in background services for reliability. Read full topic.

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210. Payment Gateway Integration in ASP.NET

Never handle raw card data unless PCI scope is intentional. Read full topic.

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211. Stripe Integration in ASP.NET

Verify webhook signatures before updating orders. Read full topic.

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212. PayPal Integration in ASP.NET

Confirm capture via webhooks or return URL verification. Read full topic.

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213. Third-Party API Integration in ASP.NET

Use Polly for retries/circuit breakers thoughtfully. Read full topic.

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214. Webhooks in ASP.NET

Process asynchronously; acknowledge quickly. Read full topic.

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215. Microservices with .NET

Start modular monolith first unless boundaries are clear. Read full topic.

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216. Docker with ASP.NET

Don�t bake secrets into images. Read full topic.

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217. CI/CD for ASP.NET

Gate production deploys on tests and approvals. Read full topic.

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218. Azure Deployment for ASP.NET

Use Key Vault references for secrets. Read full topic.

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219. IIS Deployment for ASP.NET

Configure bindings, TLS, and app pool identity permissions. Read full topic.

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220. Linux Deployment for ASP.NET

systemd units keep the app alive. Read full topic.

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221. Performance Monitoring in ASP.NET

Alert on error rates and p95 latency. Read full topic.

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222. Application Logging in ASP.NET

Centralize logs (Seq, ELK, cloud logging). Read full topic.

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223. Unit Testing in ASP.NET

Keep tests fast and deterministic. Read full topic.

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224. xUnit for ASP.NET

Default test framework for many .NET templates. Read full topic.

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225. NUnit for ASP.NET

Both xUnit and NUnit are solid � pick one per solution. Read full topic.

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226. Integration Testing in ASP.NET

Replace DB with test containers or SQLite as appropriate. Read full topic.

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227. API Testing in ASP.NET

Combine with Postman/Newman in CI. Read full topic.

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228. Mocking in ASP.NET Tests

Don�t mock what you don�t own when integration tests fit better. Read full topic.

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229. OWASP Security for ASP.NET

Threat-model auth, injection, and sensitive data exposure. Read full topic.

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230. SQL Injection Prevention in ASP.NET

Never concatenate untrusted input into SQL. This topic covers defense only. Read full topic.

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231. XSS Prevention in ASP.NET

Razor encodes by default � be careful with Html.Raw. Defense only. Read full topic.

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232. CSRF Protection in ASP.NET

APIs using bearer tokens typically aren�t CSRF-vulnerable the same way. Read full topic.

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233. Authentication Security in ASP.NET

Identity handles many defaults � configure them consciously. Read full topic.

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234. Authorization Security in ASP.NET

Hide UI but always authorize on the server. Read full topic.

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235. Secure API Development in ASP.NET

Design for least data exposure in DTOs. Read full topic.

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236. HTTPS and SSL in ASP.NET

Terminate TLS at proxy or Kestrel with valid certificates. Read full topic.

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237. Secrets Management in ASP.NET

Rotate keys and limit access with RBAC. Read full topic.

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238. ASP.NET Login & Registration System

Include email confirmation optional and role assignment basics. Read full topic.

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239. ASP.NET Blog Management System

Add rich text carefully with sanitization. Read full topic.

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240. ASP.NET Employee Management System

Include search/paging and export optional. Read full topic.

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241. ASP.NET E-Commerce Website

Keep payment as stub or sandbox integration. Read full topic.

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242. ASP.NET REST API Project

Include pagination and global exception handling. Read full topic.

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243. ASP.NET CRM Application

Role-based pipelines for sales users/managers. Read full topic.

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244. ASP.NET Admin Dashboard

Protect with Admin role; chart library optional. Read full topic.

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245. ASP.NET Real-Time Chat Application

Authenticate hub users; moderate groups. Read full topic.

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246. ASP.NET Payment Integration Project

Idempotent order state transitions are required. Read full topic.

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247. Final Project � Complete Production-Ready ASP.NET Core Application

Build a complete ASP.NET Core application (e.g., service desk or inventory SaaS slice): Identity auth + roles, EF Core + migrations, MVC or Razor Pages UI, Web API endpoints, validation, logging, tests, Docker/IIS/Azure deploy notes, and security baselines (HTTPS, secrets, CSRF/XSS/SQL defenses). Read full topic.

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Conclusion

You now have a full path from Classic ASP to modern ASP.NET Core: web UI, APIs, data access, security, and deployment. Finish the final production-ready ASP.NET Core application to turn the lessons into a portfolio-ready system.