Added some content

Solid-Color-Brush.md

@@ -1 +1,7 @@
-TODO
+The _SolidColorBrush_ is one of the default brushes provided by CUE.NET.  
+By just returning a single color for all keys it get applied it's the simplest brush imaginable.
+
+A _SolidColorBrush_ only needs to now about it's color, which is provided as constructor-parameter or by using the _Color_-Property.
+```C#
+SolidColorBrush solidColorBrush = new SolidColorBrush(Color.White);
+```