public class DisplayRequest : IDisplayRequest

public void Initialize()
{
    this.displayRequest = new DisplayRequest(this.Activity.Window);
​
    try
    {
        // This call activates a display-required request. If successful,  
        // the screen is guaranteed not to turn off automatically due to user inactivity. 
        this.displayRequest.RequestActive();
    }
    catch (Exception ex)
    {
        System.Diagnostics.Debug.WriteLine(ex.ToString());
    }
​
    // Perform long-running application initialization.
​
    try
    {
        // This call de-activates the display-required request. If successful, the screen 
        // might be turned off automatically due to a user inactivity, depending on the 
        // power policy settings of the system. 
        this.displayRequest.RequestRelease();
    }
    catch (Exception ex)
    {
        System.Diagnostics.Debug.WriteLine(ex.ToString());
    }
}

public Android.Views.Window Originator { get; }

public Windows.System.Display.DisplayRequest Originator { get; }

void RequestActive();

void RequestRelease();