string patternStrict = @"^[\w]+[\d._-]*[\w]*[@]{1}[\w]+[.]{1}[\w]+[,]?([\w]+[\d._-]*[\w]*[@]{1}[\w]+[.]{1}[\w]+[,]?)*$";
string patternStrict =@"^([\w-]+\.)*?[\w-]+@[\w-]+\.([\w-]+\.)*?[\w]+$"
hi, please see below code will work properly. \w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)* Cheers, Jitendra Kumar
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