How to replace the if else construct with a switch?

Question

WPF

There are several buttons, when you click on each, changes occur with other elements.
Here I wrote the code for 2 buttons, and there will be 8 of them in total.
I used the if else states. Everything works, but everything is quite cumbersome
How can I use switch instead of if else to be more compact in the code?
CategoryToggle1 - buttons
RectCategory1 - rectangle

if (CategoryToggle1.IsChecked == true)
                {
                    RectCategory1.Fill = new SolidColorBrush(dialog.Color);

                    Properties.Settings.Default.RectangleCategory1 = new BrushConverter().ConvertToString(dialog.Color);

                }
                else if (CategoryToggle2.IsChecked == true)
                {
                    RectCategory2.Fill = new SolidColorBrush(dialog.Color);

                    Properties.Settings.Default.RectangleCategory2 = new BrushConverter().ConvertToString(dialog.Color);
                }

Answer 1

But with switchwill not be more compact.
It will be more compact if you place your own CategoryTogglein RectangleCategoryarrays. And then you will have only one logic, check the checker and apply the brush.

for (int i = 0; i < categoryToggleArr.Length; i++)
{
   if (categoryToggleArr[i].IsChecked)
   {
      RectCategoryArr[i].Fill = new SolidColorBrush(dialog.Color);
      RectangleCategoryArr[i] = new BrushConverter().ConvertToString(dialog.Color);
   }
}

Answer 2

switch works on one variable.
you have 2
CategoryToggle1.IsChecked
CategoryToggle2.IsChecked