Visual Studio 2010 C# .NET textbox restrictions

Posted by ilkdrl on Stack Overflow See other posts from Stack Overflow or by ilkdrl
Published on 2010-05-08T00:09:26Z Indexed on 2010/05/09 18:48 UTC
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if user entered "!" "?" "," in textbox and press button, this person see ERROR message in label. how can make that? and what is the code?

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