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Why Can't I Catch a Stack Overflow Exception in C#?

Barbara Streisand
Release: 2025-01-25 01:16:11
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Why Can't I Catch a Stack Overflow Exception in C#?

Understanding Unhandled Stack Overflow Exceptions in C#

Why can't you trap a stack overflow exception using a try-catch block in C#? The answer lies in the nature of this specific exception type.

The Nature of Stack Overflow Exceptions

Unlike most exceptions, C# generally prevents the catching of stack overflow exceptions. This limitation was introduced in version 2.0. There are only two exceptions to this rule:

  1. Hosted CLR Environments: If the Common Language Runtime (CLR) runs within a hosted environment where the host has explicitly enabled handling for stack overflow exceptions.
  2. Programmatically Thrown Exceptions: If the stack overflow exception is deliberately thrown by your code, rather than resulting from an actual stack overflow.

Irrelevant Factors

The original question mentions a background thread and the use of Assembly.LoadFrom(...).CreateInstance(...). These details are not relevant to the core issue. The inability to catch a stack overflow exception applies regardless of the thread context or how the object causing the problem was loaded.

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