Fixed the "override" modifier of overridden methods and properties from secondary bases.

Signed-off-by: Dimitar Dobrev <dpldobrev@yahoo.com>

src/Generator/Generators/CSharp/CSharpTextTemplate.cs

@@ -470,6 +470,7 @@ namespace CppSharp.Generators.CSharp
                 var type = prop.Type;
                 if (prop.Parameters.Count > 0 && prop.Type.IsPointerToPrimitiveType())
                     type = ((PointerType) prop.Type).Pointee;
+                GenerateDeclarationCommon(prop);
                 Write("{0} {1} {{ ", type, GetPropertyName(prop));
                 if (prop.HasGetter)
                     Write("get; ");
@@ -1119,7 +1120,8 @@ namespace CppSharp.Generators.CSharp
                     if (prop.IsStatic)
                         Write("static ");
 
-                    if (prop.IsOverride)
+                    // check if overriding a property from a secondary base
+                    if (prop.IsOverride && @class.GetRootBaseProperty(prop, true) != null)
                         Write("override ");
                     else if (prop.IsPure && Driver.Options.GenerateAbstractImpls)
                         Write("abstract ");
@@ -1761,7 +1763,7 @@ namespace CppSharp.Generators.CSharp
             WriteCloseBraceIndent();
             NewLine();
 
-            WriteLine("public virtual void {0}()", destroyNativeInstance);
+            WriteLine("public {0} void {1}()", hasBaseClass ? "override" : "virtual", destroyNativeInstance);
             WriteStartBraceIndent();
             WriteLine("{0}(true);", destroyNativeInstance);
             WriteCloseBraceIndent();
@@ -1976,7 +1978,10 @@ namespace CppSharp.Generators.CSharp
                 Write(Helpers.GetAccess(GetValidMethodAccess(method)));
             }
 
-            if (method.IsVirtual && !method.IsOverride && !method.IsOperator &&
+            // check if overriding a function from a secondary base
+            var isOverride = method.IsOverride && @class.GetRootBaseMethod(method, true) != null;
+
+            if (method.IsVirtual && !isOverride && !method.IsOperator &&
                 (!Driver.Options.GenerateAbstractImpls || !method.IsPure))
                 Write("virtual ");
 
@@ -1986,7 +1991,7 @@ namespace CppSharp.Generators.CSharp
             if (method.IsStatic || isBuiltinOperator)
                 Write("static ");
 
-            if (method.IsOverride)
+            if (isOverride)
             {
                 if (method.Access == AccessSpecifier.Private)
                     Write("sealed ");

src/Generator/Passes/MultipleInheritancePass.cs

@@ -181,8 +181,12 @@ namespace CppSharp.Passes
 
         private static void ImplementInterfaceMethods(Class @class, Class @interface)
         {
+            var parameterTypeComparer = new ParameterTypeComparer();
             foreach (var method in @interface.Methods)
             {
+                if (@class.Methods.Any(m => m.OriginalName == method.OriginalName &&
+                                            m.Parameters.SequenceEqual(method.Parameters, parameterTypeComparer)))
+                    continue;
                 var impl = new Method(method)
                     {
                         Namespace = @class,

tests/CSharpTemp/CSharpTemp.cpp

@@ -469,3 +469,20 @@ void TestNativeToManagedMap::setPropertyWithNoVirtualDtor(Bar* bar)
 {
     this->bar = bar;
 }
+
+void SecondaryBase::VirtualMember()
+{
+}
+
+int SecondaryBase::property()
+{
+    return 0;
+}
+
+void SecondaryBase::setProperty(int value)
+{
+}
+
+void TestOverrideFromSecondaryBase::VirtualMember()
+{
+}

tests/CSharpTemp/CSharpTemp.h

@@ -478,3 +478,18 @@ protected:
         double d;
     } u;
 };
+
+class DLL_API SecondaryBase
+{
+public:
+    virtual void VirtualMember();
+    int property();
+    void setProperty(int value);
+};
+
+class DLL_API TestOverrideFromSecondaryBase : public Foo, public SecondaryBase
+{
+public:
+    void VirtualMember();
+    void setProperty(int value);
+};