Add project files.

Library/Helpers/UAC.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Security.Principal;
+
+namespace CMM.Library.Helpers
+{
+    public class UAC
+    {
+        public static void Check()
+        {
+            var identity = WindowsIdentity.GetCurrent();
+            var principal = new WindowsPrincipal(identity);
+            if (!principal.IsInRole(WindowsBuiltInRole.Administrator))
+                throw new Exception($"Cannot delete task with your current identity '{identity.Name}' permissions level." +
+                "You likely need to run this application 'as administrator' even if you are using an administrator account.");
+
+        }
+    }
+}