Validation Summary is a validation control which renders summary of all the validation errors on submit.

to view all control error messages at one place

1. RequiredFieldValidator - to check for mandatory field 2.RangeValidator - to check for data in the specified range 3. RegularExpressionValidator - to check for data in a particular regular expression 4. ComapreValidator - to compare two data or data types 5. CustomValidator - to attach a custom a control with the help of user defined function 6.ValidationSummary - to summarize all validation error.

to view all validation control error message.