Gstreamer-sharp can't run on windows

I'm trying to run Gstreamer-Sharp on windows. I downloaded the source code from github and tried running samples. I followed this installation guide and added environment variables as required. But When I run Gstreamer, I get this exception:

Exception thrown: 'System.DllNotFoundException' in gstreamer-sharp.dll An unhandled exception of type 'System.DllNotFoundException' occurred in gstreamer-sharp.dll Unable to load DLL 'gstapp-1.0-0.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)

This exception occures when initializing the library at

GLib.GType.Register (Gst.App.AppSink.GType, typeof (Gst.App.AppSink));