Framework_4_0 preprocessor is necessary for legacy compatibility.

Server/Region.cs

@@ -1137,7 +1137,7 @@ namespace Server
 
 			if ( s == null )
 				return false;
-
+#if Framework_4_0
 			Type type = typeof(T);
 			T tempVal;
 
@@ -1151,6 +1151,19 @@ namespace Server
 				Console.WriteLine( "Could not parse {0} enum attribute '{1}' in element '{2}'", type, attribute, xml.Name );
 				return false;
 			}
+#else
+			try
+			{
+				value = (T)Enum.Parse(type, s, true);
+			}
+			catch
+			{
+				Console.WriteLine( "Could not parse {0} enum attribute '{1}' in element '{2}'", type, attribute, xml.Name );
+				return false;
+			}
+
+			return true;
+#endif
 		}
 
 		public static bool ReadMap( XmlElement xml, string attribute, ref Map value )