public void Property_Equals_Should_Handle_Null()
{
var p1 = new TestProperty <string>("p1", typeof(Class1));
Assert.NotNull(p1);
Assert.NotNull(p1);
Assert.False(p1 == null);
Assert.False(null == p1);
Assert.False(p1.Equals(null));
Assert.True((AvaloniaProperty)null == (AvaloniaProperty)null);
}