How to use Concat methode in c#.net

Concat :

"This methode will add or sum or join two string and give single string as an output "

How to Use :

        String str = string.Concat( String str1,String str2)

Input Parameter :

         str1 = (string)
         str2 = (string)

Output Parameter :

         str = (string)


Example  :: 

/////////////////////////  CODE   /////////////////////

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace StringConcat
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string str1 = "Nirav";
            string str2 = "Daraniya";
            string str = "";

            str = string.Concat(str1, str2);
            MessageBox.Show(str);
        }
    }
}


////////////////////////////////  OUTPUT   //////////////////////////////

NiravDaraniya

//////////////////////////////////////////////////////////////////////////////////





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