Fix some resharper warnings and errors

Vocaluxe/COSFunctions.cs

@@ -16,7 +16,6 @@
 #endregion
 
 using System;
-using System.Drawing;
 using System.Runtime.InteropServices;
 
 namespace Vocaluxe
@@ -24,29 +23,14 @@ namespace Vocaluxe
     static class COSFunctions
     {
 #if WIN
-        private static bool _DefaultDllDirSet;
-        private static bool _UsePath;
-        private static bool _UseSetDllDir;
-
         private static class CWindowsFunctions
         {
-            [DllImport("kernel32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
-            public static extern void AddDllDirectory(string lpPathName);
-
-            [DllImport("kernel32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
-            public static extern void SetDllDirectory(string lpPathName);
-
+            // ReSharper disable MemberHidesStaticFromOuterClass
             [DllImport("user32.dll", CallingConvention = CallingConvention.StdCall)]
             [return: MarshalAs(UnmanagedType.Bool)]
             public static extern bool SetForegroundWindow(IntPtr hWnd);
 
-            [DllImport("kernel32.dll", CallingConvention = CallingConvention.StdCall)]
-            [return: MarshalAs(UnmanagedType.Bool)]
-            public static extern bool SetDefaultDllDirectories(int directoryFlags);
-
-            // ReSharper disable InconsistentNaming
-            public const int LOAD_LIBRARY_SEARCH_DEFAULT_DIRS = 0x00001000;
-            // ReSharper restore InconsistentNaming
+            // ReSharper restore MemberHidesStaticFromOuterClass
         }
 #endif