How to locate a particular exception in a Exception stack

Let us assume that a particular Exception "SomeException" is part of the exception stack,

so let us assume ex.InnerException.InnerException.InnerException is of type "SomeException"

Is there any built-in API in C# which will try to locate a given exception type in exception stack?

Example:

SomeException someExp = exp.LocateExceptionInStack(typeof(SomeException));

From stackoverflow

• No, I don't believe there's any built in way of doing it. It's not hard to write though:

  public static T LocateException<T>(Exception outer) where T : Exception
  {
      while (outer != null)
      {
          T candidate = outer as T;
          if (candidate != null)
          {
              return candidate;
          }
          outer = outer.InnerException;
      }
      return null;
  }
  

  If you're using C# 3 you could make it an extension method (just make the parameter "this Exception outer") and it would be even nicer to use:

  SomeException nested = originalException.Locate<SomeException>();
  

  (Note the shortening of the name as well - adjust to your own taste :)

• It's just 4 lines of code:

      public static bool Contains<T>(Exception exception)
          where T : Exception
      {
          if(exception is T)
              return true;
  
          return 
              exception.InnerException != null && 
              LocateExceptionInStack<T>(exception.InnerException);
      }
  

  Pontus Gagge : If it's supposed to do recursion, you might want to determine whether to call it Contains or LocateExceptionInStack...