How Can I Rethrow Inner Exceptions in C# While Preserving the Original Stack Trace?

Preserving stack trace when rethrowing inner exception in C#

When calling a method through reflection, exceptions will be wrapped in TargetInvocationException. In order to pass the underlying exception to the caller while preserving its stack trace, rethrowing the InnerException is a common approach. However, this method inadvertently erases the original stack trace.

Solutions for .NET 4.5 and above

ExceptionDispatchInfo was introduced in .NET 4.5, providing a solution to this problem. By catching the exception and then rethrowing it, the stack trace will remain unchanged:

<code class="language-csharp">using ExceptionDispatchInfo =
    System.Runtime.ExceptionServices.ExceptionDispatchInfo;

try
{
    // 可能引发异常的代码
}
catch (Exception ex)
{
    ExceptionDispatchInfo.Capture(ex).Throw();
}</code>

This method works for any type of exception, not just AggregateException.

Advantages of ExceptionDispatchInfo

ExceptionDispatchInfo has the following advantages:

• Preserve original stack traces, providing valuable information during debugging.
• Supports other exception wrappers such as AggregateException.
• Simplify exception handling in asynchronous programming scenarios.

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