Regex Email validation in C#

To do regex Email validation in C# you can use below example, remember to include the required namespace: using System.Text.RegularExpressions;

Example of Regex email validation in C#

using System;
using System.Text.RegularExpressions;

public class Program
{
	public static void Main()
	{
		string email = "ms@gmail.com";
		bool isValid = Regex.IsMatch(email, @"\A[a-z0-9]+([-._][a-z0-9]+)*@([a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,4}\z")
		&& Regex.IsMatch(email, @"^(?=.{1,64}@.{4,64}$)(?=.{6,100}$).*");
		Console.WriteLine("email is valid: " + isValid);
		
		email = "ms-gmail.com";
		isValid = Regex.IsMatch(email, @"\A[a-z0-9]+([-._][a-z0-9]+)*@([a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,4}\z")
		&& Regex.IsMatch(email, @"^(?=.{1,64}@.{4,64}$)(?=.{6,100}$).*");
		Console.WriteLine("email is valid: " + isValid);
	}
}

Output

email is valid: True
email is valid: False

Conclusion

In this page (written and validated by A. Gawali) you learned about Regex Email validation in C# . What's Next? If you are interested in completing C# tutorial, we encourage you simply to start here: C# Tutorial.

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