support for .NET framework 3.5

Still have bugs

Net35/HandyControl_Net35/Shell/Standard/SHARDAPPIDINFO.cs

@@ -0,0 +1,16 @@
+namespace Standard
+{
+    using System;
+    using System.Diagnostics.CodeAnalysis;
+    using System.Runtime.InteropServices;
+
+    [StructLayout(LayoutKind.Sequential, Pack=4), SuppressMessage("Microsoft.Performance", "CA1812:AvoidUninstantiatedInternalClasses")]
+    internal class SHARDAPPIDINFO
+    {
+        [MarshalAs(UnmanagedType.Interface)]
+        private object psi;
+        [MarshalAs(UnmanagedType.LPWStr)]
+        private string pszAppID;
+    }
+}
+