How do I change the Foreground color in a ListBox? - Continued #1

Question

C# wpf --- This is a "continuation" of c-sharpcorner.com/forums/how-do-i-programmically-change-the-foreground-color-in-a-listbox.

Jayraj Chhaya, I have this xaml code:

<ListBox x:Name="gLBxOriginalCities" 
        Margin="5,0,5,10" 
        Foreground="#000000" 
        MouseDoubleClick="gLBxOriginalCities_MouseDoubleClick">
</ListBox>

and modified the xaml.cs code:

int iCount = liststX.Count();
for (int ii = 0; ii < iCount; ii++) {
    if (liststX[ii].Contains("blue"))
        LBx.Items.Add(liststX[ii], System.Drawing.Color.Blue);
    else if (liststX[ii].Contains("red"))
        LBx.Items.Add(liststX[ii], System.Drawing.Color.Red);
    else if (liststX[ii].Contains("green"))
        LBx.Items.Add(liststX[ii], System.Drawing.Color.Green);
}

Results in

No overload for method 'Add' takes 2 arguments

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Sarthak Varshney, My mistake for not clarifying that I am using wpf.  There are many other ListBoxes, CheckBoxes, etc. in the xaml file. 

Not sure how to proceed with using the xaml code. 

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How do I programmically change the Foreground color in a ListBox?