Fixed type system converter case reported from "erik-kallen".

ICSharpCode.NRefactory.CSharp/TypeSystem/TypeSystemConvertVisitor.cs

@@ -651,6 +651,14 @@ namespace ICSharpCode.NRefactory.CSharp.TypeSystem
 					a.Parameters.Add(indexerParam);
 			}
 			DefaultUnresolvedParameter param = null;
+			
+			// copy indexer parameters to the accessor
+			if (p is IUnresolvedParameterizedMember) {
+				foreach (var parameter in ((IUnresolvedParameterizedMember)p).Parameters) {
+					a.Parameters.Add (parameter);
+				}
+			}
+			
 			if (accessor.Role == PropertyDeclaration.GetterRole) {
 				a.ReturnType = p.ReturnType;
 			} else {

ICSharpCode.NRefactory.Tests/CSharp/Parser/TypeSystemConvertVisitorTests.cs

@@ -80,6 +80,17 @@ namespace ICSharpCode.NRefactory.CSharp.Parser
 			Assert.AreEqual(genericInterfaceOfString, interfaceMethod2.DeclaringType);
 			Assert.IsTrue(interfaceMethod2.Parameters[1].IsRef);
 		}
+		
+		[Test]
+		public void IndexerParameters()
+		{
+			var testClass = GetTypeDefinition(typeof(NRefactory.TypeSystem.TestCase.IndexerTest));
+			IProperty p = testClass.Properties.Single(pr => pr.IsIndexer);
+			Assert.AreEqual("Item", p.Name);
+			
+			Assert.AreEqual(new[] { "index" }, p.Getter.Parameters.Select(x => x.Name).ToArray());
+			Assert.AreEqual(new[] { "index", "value" }, p.Setter.Parameters.Select(x => x.Name).ToArray());
+		}
 	}
 	
 	[TestFixture]

ICSharpCode.NRefactory.Tests/TypeSystem/TypeSystemTests.TestCase.cs

@@ -180,4 +180,10 @@ namespace ICSharpCode.NRefactory.TypeSystem.TestCase
 		void IGenericInterface<string>.Test<T>(string a, T b) {}
 		void IGenericInterface<string>.Test<T>(string a, ref T b) {}
 	}
+	
+	public class IndexerTest
+	{
+		public string this[int index] { get { return "Test"; } set {} }
+	}
 }
+