V-table method delegates need to take into account same-named overloads.

Fixes #88.

src/Generator/Generators/CSharp/CSharpTextTemplate.cs

@@ -1370,8 +1370,12 @@ namespace CppSharp.Generators.CSharp
 
         public string GetVTableMethodDelegateName(Method method)
         {
-            // trim '@' (if any) because '@' is valid only as the first symbol
-            return string.Format("_{0}Delegate", GetFunctionIdentifier(method).Trim('@'));
+            var nativeId = GetFunctionNativeIdentifier(method);
+
+            // Trim '@' (if any) because '@' is valid only as the first symbol.
+            nativeId = nativeId.Trim('@');
+
+            return string.Format("_{0}Delegate", nativeId);
         }
 
         public void GenerateVTablePointers(Class @class)

tests/VTables/VTables.cpp

@@ -14,6 +14,16 @@ int Foo::vbar()
     return 3;
 }
 
+int Foo::append()
+{
+    return 1;
+}
+
+int Foo::append(int a)
+{
+    return ++a;
+}
+
 int FooCallFoo(Foo* foo)
 {
     return foo->vfoo() + 2;

tests/VTables/VTables.h

@@ -15,6 +15,9 @@ public:
     Foo();
     virtual int vfoo();
     virtual int vbar();
+
+    virtual int append();
+    virtual int append(int a);
 };
 
 DLL_API int FooCallFoo(Foo* foo);