Desktop Duplication API for .NET Core

Receive desktop frame data in real time, using the Windows 8 Desktop Duplication API.

Install using NuGet

How to use

Initialization

try
{
    desktopDuplicator = new DesktopDuplicator(0);
    // Desktop Duplication API initialized
}
catch (Exception ex)
{
    MessageBox.Show("An error occurred initializing the screen capture module.\nException: \n" + ex.ToString());
}

Screen Capture

public static Bitmap GetNextFrame()
{
    try
    {
        DesktopFrame frame = desktopDuplicator.GetLatestFrame();
        if (frame != null)
        {
            Bitmap frameBitmap = frame.DesktopImage;
            return frameBitmap;

        }
    }
    catch (Exception)
    {
        desktopDuplicator.Dispose();
        desktopDuplicator = new DesktopDuplicator(0);
        // Don't worry, exceptions are expected to happen
    }
    return null;
}

DesktopDuplicationException exceptions can occur when there is a change in the display mode, or a new frame isn't available yet. This can happen as a result of switching to a full-screen app, for example. The DesktopDuplicator object needs to be reinitialized because the SharpDX output duplication must be created for the specific display mode. You must call Dispose on the DesktopDuplicator object before creating a new one, or you will have memory leaks.