[CodeActions] Fixed implement abstract members bug.

ICSharpCode.NRefactory.CSharp/Refactoring/CodeActions/ImplementInterfaceAction.cs

@@ -101,7 +101,11 @@ namespace ICSharpCode.NRefactory.CSharp.Refactoring
 				decl.Modifiers = Modifiers.None;
 				decl.AddChild(builder.ConvertType(member.DeclaringType), EntityDeclaration.PrivateImplementationTypeRole);
 			} else {
-				decl.Modifiers = Modifiers.Public;
+				if (member.IsProtected) {
+					decl.Modifiers = Modifiers.Protected;
+				} else {
+					decl.Modifiers = Modifiers.Public;
+				}
 			}
 			return decl;
 		}

ICSharpCode.NRefactory.Tests/CSharp/CodeActions/ImplementAbstractMembersTest.cs

@@ -55,6 +55,33 @@ class Foo : Simple
 	}
 	#endregion
 }
+");
+		}
+
+		[Test()]
+		public void TestProtectedMembers()
+		{
+			Test<ImplementAbstractMembersAction>(@"abstract class Simple {
+	protected abstract string ServiceName { get; }
+}
+
+class Foo : $Simple
+{
+}
+", @"abstract class Simple {
+	protected abstract string ServiceName { get; }
+}
+
+class Foo : Simple
+{
+	#region implemented abstract members of Simple
+	protected override string ServiceName {
+		get {
+			throw new System.NotImplementedException ();
+		}
+	}
+	#endregion
+}
 ");
 		}