support for .NET framework 3.5

Still have bugs

Net35/HandyControl_Net35/Shell/Standard/NONCLIENTMETRICS.cs

@@ -0,0 +1,44 @@
+namespace Standard
+{
+    using System;
+    using System.Diagnostics.CodeAnalysis;
+    using System.Runtime.InteropServices;
+
+    [StructLayout(LayoutKind.Sequential)]
+    internal struct NONCLIENTMETRICS
+    {
+        public int cbSize;
+        public int iBorderWidth;
+        public int iScrollWidth;
+        public int iScrollHeight;
+        public int iCaptionWidth;
+        public int iCaptionHeight;
+        public Standard.LOGFONT lfCaptionFont;
+        public int iSmCaptionWidth;
+        public int iSmCaptionHeight;
+        public Standard.LOGFONT lfSmCaptionFont;
+        public int iMenuWidth;
+        public int iMenuHeight;
+        public Standard.LOGFONT lfMenuFont;
+        public Standard.LOGFONT lfStatusFont;
+        public Standard.LOGFONT lfMessageFont;
+        public int iPaddedBorderWidth;
+        [SuppressMessage("Microsoft.Security", "CA2122:DoNotIndirectlyExposeMethodsWithLinkDemands")]
+        public static Standard.NONCLIENTMETRICS VistaMetricsStruct
+        {
+            get
+            {
+                return new Standard.NONCLIENTMETRICS { cbSize = Marshal.SizeOf(typeof(Standard.NONCLIENTMETRICS)) };
+            }
+        }
+        [SuppressMessage("Microsoft.Security", "CA2122:DoNotIndirectlyExposeMethodsWithLinkDemands")]
+        public static Standard.NONCLIENTMETRICS XPMetricsStruct
+        {
+            get
+            {
+                return new Standard.NONCLIENTMETRICS { cbSize = Marshal.SizeOf(typeof(Standard.NONCLIENTMETRICS)) - 4 };
+            }
+        }
+    }
+}
+