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ASP.NET provides 6 types of validation controls as listed below: i.) RequiredFieldValidator - It is used when you do not want the container to be empty. It checks if the control has any value or not. ii.) RangeValidator - It checks if the value in validated control is within the specified range or not. iii.) CompareValidator - Checks if the value in controls matches some specific values or not. iv.) RegularExpressionValidator - Checks if the value matches a specific regular expression or not. v.) CustomValidator - Used to define User Defined validation. vi.) Validation Summary -Displays summary of all current validation errors on an ASP.NET page.