WindowsFormsHost inside RadWindow is not visible

Environment

Product Version 2019.1.220
Product RadWindow for WPF and Silverlight

Description

WindowsFormsHost is not displayed when set as the content of a RadWindow control.

Solution

To display the content of the WindowsFormsHost you need to make the RadWindow control non-transparent. This can be achieved by setting the attached WindowInteropHelper.AllowTransparency property to False.

public App() 
{ 
    var window = new MainWindow(); 
    RadWindowInteropHelper.SetAllowTransparency(window, false); 
    window.Show(); 
} 

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