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Otherwise, neither of the instances mentioned above lead to editor validation.

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If you do not set the Cancel property, Windows Forms will assume that validation succeeded for that control, and raise the Validated event.

For a code example that validates an email address in a Text Box, see Validating.

You may require that certain text fields not be zero-length, that a field be formatted as a telephone number or other type of well-formed data, or that a string not contain any unsafe characters that could be used to compromise the security of a database.

Windows Forms provides several ways for you to validate input in your application.

You do not have to disable the Form’s Auto Validate property.