Using WinForms ColorDialog in WPF is giving error: 'Color' parameter type is not valid for formatting property 'Background'

Question

This question has been answered online and I'm trying to follow those answers, but I'm still getting the following error. Question: What I may be doing wrong here and how can we resolve it?

NOTE:

1. I'm using ColorDialog Class from Windows Form to implement the similar functionality in wpf
2. I do not want to use a third party tool (WPFToolKit etc).

WPF Relevant Code:

Using ....
using System.Windows.Forms; //for winforms' ColorDialog
......
private void BtnTest_Click(object sender, RoutedEventArgs e)
{
   ColorDialog MyDialog = new ColorDialog(); //from Winform
   MyDialog.AllowFullOpen = false;
   MyDialog.ShowHelp = true;

if (MyDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
    try
    {
        TextSelection textSelection = mainRTB.Selection;
        if (!textSelection.IsEmpty)
        {
             //Use the WPF System.Windows.Media.Brushes class instead of System.Drawing.Brushes from WinForms:
            textSelection.ApplyPropertyValue(TextElement.BackgroundProperty, ColorHelper.ToSWMColor(MyDialog.Color)); //error occurs at this line
        }
    }
    catch (Exception ex)
    {
        System.Diagnostics.Debug.WriteLine(ex.Message);
    }
}
}

ColorHelper Class (I created in the same project):

using SDColor = System.Drawing.Color;
using SWMColor = System.Windows.Media.Color;

namespace ColorDialog_for_WPF
{
    public static class ColorHelper
    {
        public static SWMColor ToSWMColor(this SDColor color) => SWMColor.FromArgb(color.A, color.R, color.G, color.B);
        public static SDColor ToSDColor(this SWMColor color) => SDColor.FromArgb(color.A, color.R, color.G, color.B);
    }
}

Error:

'Color' parameter type is not valid for formatting property 'Background'

Answer 1

The Background property is of type Brush, not Color.

You need to create a SolidColorBrush.