How to add text files into textbox, Richtextbox,label in c#

How to add text files into a textbox, Richtextbox, label in c#

First, add one textbox and a button from the toolbox and then add the yellow highlighted code as following.

using System.IO;

public Form1()

        {

            InitializeComponent();

           

        }

Now go to the button1 click event and copy the yellow highlighted code as follows.

private void button1_Click(object sender, Event Args e)

{

Stream myStream;
            OpenFileDialog openFileDialog = new OpenFileDialog();
            if (openFileDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)


            {
                if ((myStream = openFileDialog.OpenFile()) != null)
                {

                    string strfilename = openFileDialog.FileName;
                    string filetext = File.ReadAllText(strfilename);
                    label1.Text = filetext;

                }
            }

}