Extended C# the TextBox class, textbox is generally used for data input, but many data requires authentication. I extended it to verify a variety of data, such as numbers, characters and so on. Is a good example.

MyTextBox\MyTextBox\Properties\AssemblyInfo.cs
.........\.........\MyTextBoxClass.csproj
.........\.........\bin\Debug\MyTextBox.dll
.........\.........\...\.....\MyTextBox.pdb
.........\.........\obj\Debug\MyTextBox.dll
.........\.........\...\.....\MyTextBox.pdb
.........\.........\...\MyTextBoxClass.csproj.FileList.txt
.........\.........\MyTextBox.cs
.........\MyTextBox.sln
.........\MyTextBox.suo
.........\.........\obj\Debug\TempPE
.........\.........\...\.....\Refactor
.........\.........\bin\Debug
.........\.........\obj\Debug
.........\.........\Properties
.........\.........\bin
.........\.........\obj
.........\MyTextBox
MyTextBox

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