Fix to pythonas

.gitignore

@@ -36,6 +36,7 @@ coverage.xml
 *.vcxproj.filters
 *.userprefs
 *.DotSettings.user
+.runsettings
 
 # Build results
 [Bb]in/

README.rst

@@ -3,5 +3,7 @@ Ansys fork of `pythonnet <https://github.com/pythonnet/pythonnet>`_.
 We will try to keep this up-to-date with pythonnet and upstream changes that might benefit the pythonnet community
 
 Changes relative to pythonnet:
-- Revert of `#1240 <https://github.com/pythonnet/pythonnet/pull/1240>`_.
-- Enum REPR `#2239 <https://github.com/pythonnet/pythonnet/pull/2239>` is included in this release of version 3.0.2, but is unreleased in pythonnet
+
+* Revert of `#1240 <https://github.com/pythonnet/pythonnet/pull/1240>`_.
+* Enum REPR `#2239 <https://github.com/pythonnet/pythonnet/pull/2239>` is included in this release of version 3.0.2, but is unreleased in pythonnet
+* Opt-into explicit interface wrapping, `#19 <https://github.com/ansys/ansys-pythonnet/pull/19>`. This opts into the behavior that became the default in #1240 if ToPythonAs<T> is explicitly used

src/runtime/Converter.cs

@@ -117,7 +117,9 @@ private static Func<object, bool> GetIsTransparentProxy()
 
         internal static NewReference ToPythonDetectType(object? value)
             => value is null ? new NewReference(Runtime.PyNone) : ToPython(value, value.GetType());
-        internal static NewReference ToPython(object? value, Type type)
+
+
+        internal static NewReference ToPython(object? value, Type type, bool wrapInterface = false)
         {
             if (value is PyObject pyObj)
             {
@@ -144,6 +146,12 @@ internal static NewReference ToPython(object? value, Type type)
                 return CLRObject.GetReference(value, type);
             }
 
+            if (wrapInterface && type.IsInterface)
+            {
+                var ifaceObj = (InterfaceObject)ClassManager.GetClassImpl(type);
+                return ifaceObj.TryWrapObject(value);
+            }
+
             // it the type is a python subclass of a managed type then return the
             // underlying python object rather than construct a new wrapper object.
             if (value is IPythonDerivedType pyderived)
@@ -979,7 +987,7 @@ public static PyObject ToPython(this object? o)
         public static PyObject ToPythonAs<T>(this T? o)
         {
             if (o is null) return Runtime.None;
-            return Converter.ToPython(o, typeof(T)).MoveToPyObject();
+            return Converter.ToPython(o, typeof(T), true).MoveToPyObject();
         }
     }
 }