public void NSStackViewShouldChangeCustomSpacing() { view.AddView(first, NSStackViewGravity.Trailing); view.AddView(second, NSStackViewGravity.Trailing); var customSpacing = view.CustomSpacingAfterView(first); view.SetCustomSpacing(10, first); Assert.IsFalse(view.CustomSpacingAfterView(first) == customSpacing, "NSStackViewShouldChangeCustomSpacing - Failed to set CustomSpacing"); }