System.Object
   C1.Framework.Drawing.Gdi.Brushes
   C1.Framework.Drawing.Gdi.FontBuilder
   C1.Framework.Drawing.Gdi.FontWeight
   C1.Framework.Drawing.Gdi.Pens
   C1.Framework.Drawing.Gdi.RegionData
   C1.Framework.Drawing.Gdi.StringFormat
   C1.Framework.Drawing.Gdi.SystemBrushes
   C1.Framework.Drawing.Gdi.SystemPens
   C1.Framework.Mathematics.Matrix<T>
      C1.Framework.Drawing.Gdi.TransformMatrix
   C1.Framework.Mathematics.Vector<T>
      C1.Framework.Drawing.Gdi.Coordinate
   System.MarshalByRefObject
      C1.Framework.Drawing.Gdi.GdiObject
         C1.Framework.Drawing.Gdi.Bitmap
         C1.Framework.Drawing.Gdi.Brush
            C1.Framework.Drawing.Gdi.ColorBrush
            C1.Framework.Drawing.Gdi.GradientBrush
               C1.Framework.Drawing.Gdi.BoxGradientBrush
                  C1.Framework.Drawing.Gdi.LinearBoxGradientBrush
                  C1.Framework.Drawing.Gdi.TriangleBoxGradientBrush
               C1.Framework.Drawing.Gdi.LinearGradientBrush
            C1.Framework.Drawing.Gdi.HatchBrush
            C1.Framework.Drawing.Gdi.HollowBrush
            C1.Framework.Drawing.Gdi.PatternBrush
            C1.Framework.Drawing.Gdi.SolidBrush
            C1.Framework.Drawing.Gdi.TextureBrush
         C1.Framework.Drawing.Gdi.Font
         C1.Framework.Drawing.Gdi.Pen
            C1.Framework.Drawing.Gdi.ColorPen
            C1.Framework.Drawing.Gdi.DashPen
            C1.Framework.Drawing.Gdi.HollowPen
            C1.Framework.Drawing.Gdi.PatternPen
            C1.Framework.Drawing.Gdi.SolidPen
         C1.Framework.Drawing.Gdi.RawGdiObject
         C1.Framework.Drawing.Gdi.Region
      C1.Framework.Drawing.Gdi.Graphics
   System.ValueType
      C1.Framework.Drawing.Gdi.FontMetric

Reference

C1.Win.C1Input.4.5.2 Assembly