Avoid crash with duplicate named arguments to attributes (obfuscated assembly?) - http://community.sharpdevelop.net/forums/t/12181.aspx

src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/CecilReader.cs

@@ -56,7 +56,9 @@ namespace ICSharpCode.SharpDevelop.Dom
 						a.PositionalArguments.Add(GetValue(pc, member, argument));
 					}
 					foreach (CustomAttributeNamedArgument entry in att.Properties) {
-						a.NamedArguments.Add(entry.Name, GetValue(pc, member, entry.Argument));
+						// some obfuscated assemblies may contain duplicate named arguments; we'll have to ignore those
+						if (!a.NamedArguments.ContainsKey(entry.Name))
+							a.NamedArguments.Add(entry.Name, GetValue(pc, member, entry.Argument));
 					}
 				} catch (InvalidOperationException) {
 					// Workaround for Cecil bug. (some types cannot be resolved)