Can anyone give me C# code for loading Bengali Text file in a richtextbox using a button and count the number of words in that text file?

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C#

C#4.0

C#3.5

//loading text
Stream Mystream;
OpenFileDialog openfiledialog1 = new OpenFileDialog();
if (openfiledialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
if ((Mystream = openfiledialog1.OpenFile()) != null)
{

string strfilname = openfiledialog1.FileName;
string filetext = File.ReadAllText(strfilname);
richTextBox1.Text = filetext;

}
}