ARCed.Forms.CalculatorForm.buttonNumber_Click C# (CSharp) Method

        private void buttonNumber_Click(object sender, EventArgs e)
        {
            if (!this.inputstatus || this.textBox.Text == "0")
            {
                this.textBox.Text = (sender as Button).Text;
                this.inputstatus = true;
            }
            else
                this.textBox.Text += (sender as Button).Text;
        }