Index: Boo.Lang.Compiler/MediumTrust.cs
===================================================================
--- Boo.Lang.Compiler/MediumTrust.cs	(revision 0)
+++ Boo.Lang.Compiler/MediumTrust.cs	(revision 0)
@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+using System.Security;
+using System.Security.Permissions;
+using System.Text;
+
+namespace Boo.Lang.Compiler
+{
+	public class MediumTrust
+	{
+		private static bool CheckPermission(IPermission permission)
+		{
+			bool hasPermission = false;
+			try
+			{
+				permission.Demand();
+				hasPermission = true;
+			}
+			catch (SecurityException)
+			{
+			}
+			return hasPermission;
+		}
+		public static bool HasAppDomainPermission()
+		{
+			return CheckPermission(new SecurityPermission(SecurityPermissionFlag.ControlAppDomain));
+		}
+
+		public static bool HasEnvironmentPermission()
+		{
+			return CheckPermission(new EnvironmentPermission(PermissionState.Unrestricted));
+		}
+
+		public static bool HasDiscoveryPermission()
+		{
+			return CheckPermission(new FileIOPermission(PermissionState.Unrestricted));
+		}
+	}
+}