//check if there are no dlls in current directory
                DirectoryInfo dinfo = new DirectoryInfo(Application.StartupPath);

			    if (dinfo.GetFiles("*.dll").Any(fileInfo => String.Compare(fileInfo.Name, "d3dcompiler_47.dll", StringComparison.CurrentCultureIgnoreCase) != 0 &&
			                                                String.Compare(fileInfo.Name, "d3dcompiler_47_x64.dll", StringComparison.CurrentCultureIgnoreCase) != 0 &&
                                                            String.Compare(fileInfo.Name, "GFSDK_VXGI_x64.dll", StringComparison.CurrentCultureIgnoreCase) != 0 &&
			                                                String.Compare(fileInfo.Name, "GFSDK_VXGI_x86.dll", StringComparison.CurrentCultureIgnoreCase) != 0))
			    {
			        MessageBox.Show("There are DLLs in application directory. Check installation.");
			    }