Is it possible to create a text box that receives data from right to left? [Answered]

private void txtBox_Calculation_KeyUP(object sender, EventArgs e)
        {
            if (txtBox_Calculation.Text.Length <= 1) return;
            var allWithoutLastChar = txtBox_Calculation.Text[..^1];
            var lastChar = txtBox_Calculation.Text[txtBox_Calculation.Text.Length - 1];

            txtBox_Calculation.Text = lastChar + allWithoutLastChar;
        }

private void txtBox_Calculation_KeyUP(object sender, EventArgs e)
        {
            if (txtBox_Calculation.Text.Length <= 1) return;
            var allWithoutLastChar = txtBox_Calculation.Text[..^1];
            var lastChar = txtBox_Calculation.Text[txtBox_Calculation.Text.Length - 1];

            txtBox_Calculation.Text = lastChar + allWithoutLastChar;
        }

private void txtBox_Calculation_TextChanged(object sender, EventArgs e)
        {
            //will enter the values 0, 1, 2, 3; should see 3210
            string number = txtBox_Calculation.Text;
            string tempNumber = "";
            if (txtBox_Calculation.Text.Length <= 1) return;
            else
            {
                lastNumber++; //last number will initialize at 0 globally, will add 1 when entering the else statement
                tempNumber = number[lastNumber] + number; //error is here? 1 + 0 + 1, 3 elements
                number = ""; //resetting number to nothing so we can resubmit the new values
                txtBox_Calculation.Text = ""; //resetting the textbox to nothing so we can get the correct values
                //starting at element 0, fill in the text box and number with the value at that element going foward
                for(int tempCounter = 0; tempCounter <= lastNumber; tempCounter++)
                {
                    txtBox_Calculation.Text += tempNumber[tempCounter];
                    number += tempNumber[tempCounter];
                }
            }
        }

private void txtBox_Calculation_TextChanged(object sender, EventArgs e)
        {
            //will enter the values 0, 1, 2, 3; should see 3210
            string number = txtBox_Calculation.Text;
            string tempNumber = "";
            if (txtBox_Calculation.Text.Length <= 1) return;
            else
            {
                lastNumber++; //last number will initialize at 0 globally, will add 1 when entering the else statement
                tempNumber = number[lastNumber] + number; //error is here? 1 + 0 + 1, 3 elements
                number = ""; //resetting number to nothing so we can resubmit the new values
                txtBox_Calculation.Text = ""; //resetting the textbox to nothing so we can get the correct values
                //starting at element 0, fill in the text box and number with the value at that element going foward
                for(int tempCounter = 0; tempCounter <= lastNumber; tempCounter++)
                {
                    txtBox_Calculation.Text += tempNumber[tempCounter];
                    number += tempNumber[tempCounter];
                }
            }
        }