Restricting textbox input to numbers in C# [closed]

Answer 1

has some bugs but easy way :D

 private void textbox1_TextChanged(object sender, EventArgs e)
        { 
            char[] originalText = textbox1.Text.ToCharArray();
            foreach (char c in originalText)
            {
                if (!(Char.IsNumber(c)))
                {
                    textbox1.Text = textbox1.Text.Remove(textbox1.Text.IndexOf(c));
                    lblError.Visible = true;
                }
                else
                    lblError.Visible = false;
            }
            textbox1.Select(textbox1.Text.Length, 0);
        }