Clears the slide background.
This method doesn't have any parameters.
builder.CreateFile("pptx"); var oPresentation = Api.GetPresentation(); var oSlide = oPresentation.GetSlideByIndex(0); var oGs1 = Api.CreateGradientStop(Api.CreateRGBColor(255, 213, 191), 0); var oGs2 = Api.CreateGradientStop(Api.CreateRGBColor(255, 111, 61), 100000); var oFill = Api.CreateRadialGradientFill([oGs1, oGs2]); oSlide.SetBackground(oFill); var oDuplicateSlide = oSlide.Duplicate(1); oDuplicateSlide.ClearBackground(); builder.SaveFile("pptx", "ClearBackground.pptx"); builder.CloseFile();