[CodeAction] ConvertExplicitToImplicitImplementation: make implicit implementation public

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

@@ -57,6 +57,11 @@ namespace ICSharpCode.NRefactory.CSharp.Refactoring
 				{
 					var implicitImpl = (MethodDeclaration)node.Clone ();
 					implicitImpl.PrivateImplementationType = AstType.Null;
+
+					// remove visibility modifier, in case the code contains error
+					implicitImpl.Modifiers &= ~Modifiers.VisibilityMask;
+
+					implicitImpl.Modifiers |= Modifiers.Public;
 					script.Replace (node, implicitImpl);
 				});
 		}

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

@@ -52,7 +52,7 @@ interface ITest
 }
 class TestClass : ITest
 {
-	void Method ()
+	public void Method ()
 	{
 	}
 }");