throw and Custom Exceptions in C#

throw and Custom Exceptions in C# — a practical guide to C# custom exceptions with clear examples you can reuse in real projects.

C# Tutorial Series (89/121). Prefer one article? Read the complete C# tutorial.

Short description

Don’t over-create custom exceptions — use existing BCL types when they fit.

Custom exception tip

class OrderNotFoundException : Exception
{
    public OrderNotFoundException(string id) : base($"Order {id} not found") {}
}