Visual Basic Language Concepts 
How to: Check an Exception's Inner Exception 

In cases where an exception is thrown as a direct result of a previous exception, the InnerException property describes the original error. This information may allow you to handle the error more efficiently. If there is no original error, the value of InnerException will be a null reference or Nothing in Visual Basic. This property is read-only.

NoteNote

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To check an InnerException

  • Check the InnerException property of the exception to determine the cause of the original error.

    Visual Basic 
    Try
    My.Computer.FileSystem.CopyFile("file1", "file2")
Catch ex As System.IO.IOException
    MsgBox(ex.InnerException)
End Try

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npn_forever
get error when showDialog
the error is "Current thread must be set to single thread apartment (STA) mode before OLE calls can be made. Ensure that your Main function has STAThreadAttribute marked on it. This exception is only raised if a debugger is attached to the process."
what should i do?
Tags : contentbug

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