hi ,
http://www.codeproject.com/Tips/550784/Validation-using-DataAnnotations
I am following above link. with out use of MVC .am using 3 Tier . simply inside the .cs file i create that class its will work. iam change to business layer class its working. am doing slightly modification of error message display in manually. its won't
work. I want to know how to use Display method and Regular Expression in Manually
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