DataGridRow背景属性的默认值

Question

I was messing arround with DataGridRow 's Background and I found something weird.
The background color of a DataGridRow appear white, and if you print it, you get the following output:

System.Console.WriteLine(row.Background.ToString());
-----OUTPUT-----
#FFFFFFFF

If you print Brushes.White , you get the same thing:

System.Console.WriteLine(Brushes.White);
-----OUTPUT-----
#FFFFFFFF

Now, when compairing them:

System.Console.WriteLine(Brushes.White.Equals(row.Background));
-----OUTPUT-----
False

It says that they are different, which is weird, since they both are SolidColorBrush with the #FFFFFFFF value.

Is there a specific reason for DataGridRow not to use Brushes.White ?
Is it a predefined SolidBrushColor ?

Answer 1

It's because you are comparing brushes, not colors. SolidColorBrush nor Brush override Equals method therefore your're comparing it by reference and one brush not always equals another brush with the same color. Controls will use SystemColors , as defined in Windows, for default values. To compare it you need to know they are both SolidColorBrush and then compare SolidColorBrush.Color