// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002159/string-concat

​

// @nuget: Z.ExtensionMethods

​

using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        string strA = "abc";

        string strB = "def";

​

        // C# Extension Method: String - Concat

        var result = strA.Concat(strB);

        Console.WriteLine(result);

    }

}