## Why is this an issue?

A `Catch` clause that only rethrows the caught exception has the same effect as omitting the `Catch` altogether and letting it bubble up automatically.

    Dim s As String = ""
    Try
        s = File.ReadAllText(fileName)
    Catch e As Exception
        Throw
    End Try

Such clauses should either be removed or populated with the appropriate logic.

    Dim s As String = File.ReadAllText(fileName)

or

    Dim s As String = ""
    Try
        s = File.ReadAllText(fileName)
    Catch e As Exception
        logger.LogError(e)
        Throw
    End Try

### Exceptions

This rule will not generate issues for `Catch` blocks if they are followed by a `Catch` block for a more general exception type that does more than just rethrowing the exception.

    Dim s As String = ""
    Try
        s = File.ReadAllText(fileName)
    Catch e As IOException 'Compliant by exception: removing it would change the logic
        Throw
    Catch e As Exception 'Compliant: does more than just rethrow
        logger.LogError(e)
        Throw
    End Try