// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002052/string-isalpha

​

// @nuget: Z.ExtensionMethods

​

using System;

​

public class Program

{

    public static void Main()

    {

        string [] values = {"EntityFramework", "EntityFramework6"};

​

        foreach(var str in values)

        {

            // C# Extension Method: String - IsAlpha

            if(str.IsAlpha())

            {

                Console.WriteLine("{0} is Alpha", str);

            }

            else

            {

                Console.WriteLine("{0} is not Alpha", str);

            }

        }

    }

}