This morning I created another function to convert something in other something.
This time this function convert Int Value to Hex Value and Hex Value to Int Value.
You find a demo at this link.

    protected void CmdConvert1(object sender, EventArgs e)
    {
        //set the default value
        uint uiDecimal = 0;

        try
        {
            // Convert text string to integer
            uiDecimal = Convert.ToUInt32(TxtText1.Text);
        }

        catch (OverflowException exception)
        {
            // Show overflow message and return
            TxtHex1.Text = "Overflow";
            return;
        }

        // Format hex value and show in another textbox
        TxtHex1.Text = String.Format("{0:x2}", uiDecimal);
    }
   
    protected void CmdConvert2(object sender, EventArgs e)
    {
        uint uiHex = 0;

        try
        {
            // Convert hex value to int
            uiHex = Convert.ToUInt32(TxtHex2.Text, 16);
        }

        catch (OverflowException exception)
        {
            // Show overflow message and return
            TxtText2.Text = "Overflow";
            return;
        }

        // Format it and show as a string
        TxtText2.Text = uiHex.ToString();
    }