Fixed the getter/setter to property passes to not include synthesized methods.

src/Generator/Passes/GetterSetterToPropertyAdvancedPass.cs

@@ -70,7 +70,7 @@ namespace CppSharp.Passes
         public override bool VisitMethodDecl(Method method)
         {
             if (!method.IsConstructor && !method.IsDestructor && !method.IsOperator &&
-                method.IsGenerated)
+                method.IsGenerated && !method.IsSynthetized)
                 DistributeMethod(method);
             return base.VisitMethodDecl(method);
         }

src/Generator/Passes/GetterSetterToPropertyPass.cs

@@ -87,6 +87,9 @@ namespace CppSharp.Passes
             if (method.IsConstructor)
                 return false;
 
+            if (method.IsSynthetized)
+                return false;
+
             if (IsGetter(method))
             {
                 var name = method.Name.Substring("get".Length);