User281315223 posted
Since the value in your TextBox would be a string, you simply need to reverse the string via a Reverse method:
public static string Reverse(string s)
{
var characters = s.ToCharArray();
Array.Reverse(characters);
return new string(characters);
}
So you would just use this as :
YourTextBox.Text = Reverse(YourTextBox.Text);
Additionally, you could accomplish this through LINQ as a one-liner:
YourTextBox.Text = new string(YourTextBox.Text.Reverse().ToArray());