How do you throw an exception to preserve stack trace information?

How do you throw an exception to preserve stack trace information?

To keep the original stack trace information with the exception, use the throw statement without specifying the exception.

What is Rethrowing an exception in C#?

Re-throwing Exceptions Re-throwing an exception means calling the throw statement without an exception object, inside a catch block. It can only be used inside a catch block.

How do I Rethrow caught exception in C#?

DO use throw to rethrow an exception; rather than throw inside a catch block. DO set the wrapping exception’s InnerException property with the caught exception unless doing so exposes private data.

What is the correct form for Rethrowing an exception?

– Rethrowing an expression from within an exception handler can be done by calling throw, by itself, with no exception. This causes current exception to be passed on to an outer try/catch sequence. An exception can only be rethrown from within a catch block.

What is difference between the throw and throw ex in net?

throw is used to throw current exception while throw(ex) mostly used to create a wrapper of exception. throw(ex) will reset your stack trace so error will appear from the line where throw(ex) written while throw does not reset stack trace and you will get information about original exception.

What happens if we throw an exception in catch block in C#?

The C# try and catch keywords are used to define a try catch block. A try catch block is placed around code that could throw an exception. If an exception is thrown, this try catch block will handle the exception to ensure that the application does not cause an unhandled exception, user error, or crash the application.

Can I throw exception in Catch block C#?

A throw statement can be used in a catch block to re-throw the exception that is caught by the catch statement. The following example extracts source information from an IOException exception, and then throws the exception to the parent method. You can catch one exception and throw a different exception.

What is Rethrowing and exception means in C Plus Plus?

If a catch block cannot handle the particular exception it has caught, you can rethrow the exception. The rethrow expression ( throw without assignment_expression) causes the originally thrown object to be rethrown.

Why do we throw exceptions in C#?

C# Re-throw an Exception By using throw keyword in the catch block, we can re-throw an exception that is handled in the catch block. The re-throwing an exception is useful when we want to pass an exception to the caller to handle it in a way they want.