[FIXED] How to convert from km/h to m/s with TextChanged in WPF, without a lot of decimals

Issue

I want to make a m/s to km/h converter that works both ways, just like the one google does. I have used TextChanged in WPF, and it kinda works. My problem is that when I type in for example 7, the program writes 6,9999999..., in the same field. I suspect it is because the 2 fields convert back and forth and finds the most precise number.

I want it to only convert once per field. So if I type 7 in the km/h field it should only convert to m/s and then stop.

Example of me typing in 7, but getting 6,9999999

The 2 methods I use for the program:

private void ms_TextChanged(object sender, TextChangedEventArgs e)
    {
        if (ms.Text == "")
        {
            kmh.Text = "";
        }
        else
        {
            try
            {
                kmh.Text = (double.Parse(ms.Text) * 3.6).ToString();
                kmh.CaretIndex = kmh.Text.Length;
            }
            catch (Exception)
            {
                MessageBox.Show("Input must be a valid number");
            }
            
        }
    }

    private void kmt_TextChanged(object sender, TextChangedEventArgs e)
    {
        if (kmh.Text == "")
        {
            ms.Text = "";
        }
        else
        {
            try
            {
                ms.Text = (double.Parse(kmh.Text) / 3.6).ToString();
                ms.CaretIndex = ms.Text.Length;
            }
            catch (Exception)
            {
                MessageBox.Show("Input must be a valid number");
            }
            
        }
    }

Solution

Thank you for all the answers. This Link by @Sinatr helped me a lot!

I ended up with this code. I decoupled the Textchanged event before the conversion, did the conversion, and then reattached it.

private void ms_TextChanged(object sender, TextChangedEventArgs e)
    {
        if (ms.Text == "")
        {
            kmh.Text = "";
        }
        else
        {
            try
            {
                kmh.TextChanged -= kmh_TextChanged;
                kmh.Text = (double.Parse(ms.Text) * 3.6).ToString();
                kmh.TextChanged += kmh_TextChanged;
            }
            catch (Exception)
            {
                MessageBox.Show("Input must be a valid number");
            }
            
        }
    }

    private void kmt_TextChanged(object sender, TextChangedEventArgs e)
    {
        if (kmh.Text == "")
        {
            ms.Text = "";
        }
        else
        {
            try
            {
                ms.TextChanged -= ms_TextChanged;
                ms.Text = (double.Parse(kmh.Text) / 3.6).ToString();
                ms.TextChanged += ms_TextChanged;
            }
            catch (Exception)
            {
                MessageBox.Show("Input must be a valid number");
            }
            
        }
    }

Answered By - FrederikVil

Answer Checked By - Mildred Charles (PHPFixing Admin)