ASP.Net validation controls always validate on the server side and in DHTML supported browsers (now almost all browsers)it also validate at client side to reduce round trip to server. By default client side validation is true and it can be set to false on control to control basis.
"EnableClientScript" property is used to turn off client side validation -
EnableClientScript is a property for enabling / disabling client side validation
C# Corner. All contents are copyright of their authors.