C # Verify email (e-mail) address is legitimate

Used to verify that a given email address is legitimate, only for the format of the email address provided, and does not verify that it exists for real.

/// <summary>///Verify email is legitimate/// </summary>/// <param name= "email" >E -mail to verify</param> Public Static BOOLIsemail (stringemail) {//if NULL, the validation is considered unqualifiedif(IsNullOrEmpty (email)) {return false;}//clear spaces in the string to validateemail =email. Trim ();//Pattern StringstringPattern =@"^ ([0-9a-za-z] ([-.\w]*[0-9a-za-z]) *@ ([0-9a-za-z][-\w]*[0-9a-za-z]\.) +[a-za-z]{2,9}) $";//Validationreturnregexhelper.ismatch (email, pattern);}

C # Verify email (e-mail) address is legitimate