To enable ctrl+c ctrl+v ctrl+a ctrl+x on in textbox

        private void DescriptionTextBox_KeyUp(object sender, KeyEventArgs e)

        {

            // To enable ctrl+c ctrl+v ctrl+a ctrl+x on in textbox

            if (e.Control && e.KeyCode == Keys.C)

            {

                DescriptionTextBox.Copy();

            }

            if (e.Control && e.KeyCode == Keys.V)

            {

                DescriptionTextBox.Paste();

            }

            if (e.Control && e.KeyCode == Keys.A)

            {

                DescriptionTextBox.SelectAll();

            }

            if (e.Control && e.KeyCode == Keys.X)

            {

                DescriptionTextBox.Cut();

            }

        }