Adjust project structure

src/Shared/HandyControl_Shared/Tools/Interop/IconHandle.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Runtime.ConstrainedExecution;
+using System.Security;
+
+namespace HandyControl.Tools.Interop
+{
+    internal sealed class IconHandle : WpfSafeHandle
+    {
+        [SecurityCritical]
+        private IconHandle() : base(true, CommonHandles.Icon)
+        {
+        }
+
+        [SecurityCritical]
+        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
+        protected override bool ReleaseHandle()
+        {
+            return UnsafeNativeMethods.DestroyIcon(handle);
+        }
+
+        [SecurityCritical, SecuritySafeCritical]
+        internal static IconHandle GetInvalidIcon()
+        {
+            return new IconHandle();
+        }
+
+        [SecurityCritical]
+        internal IntPtr CriticalGetHandle()
+        {
+            return handle;
+        }
+    }
+}