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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Cannot implement an interface that extends another interface","articleBody":"### Environment\r\n\r\n-   Pythonnet version: 3.0.0a2\r\n-   Python version: 3.8.10\r\n-   Operating System: Ubuntu 20.04.4 LTS (docker run --rm -it ubuntu:20.04)\r\n-   .NET Runtime: .NET Core 6.0.202\r\n\r\n### Details\r\n\r\n-   Describe what you were trying to get done.\r\n\r\n    Attempting to implement interfaces defined in .NET. Works fine for simple interfaces but I receive a weird error when the interface extends IDisposable\r\n\r\n-   What commands did you run to trigger this issue? If you can provide a\r\n    [Minimal, Complete, and Verifiable example](http://stackoverflow.com/help/mcve)\r\n    this will help us understand the issue.\r\n\r\n```python\r\nfrom clr_loader import get_coreclr\r\nrt = get_coreclr(\"conf.json\")\r\nfrom pythonnet import set_runtime\r\nset_runtime(rt)\r\nimport clr\r\n\r\nimport System\r\nimport System.Buffers\r\n\r\n\r\nclass MyDisposable(System.IDisposable):\r\n    __namespace__ = \"MyNamespace\"\r\n\r\n    def Dispose(self) -\u003e None:\r\n        print(\"Dispose\")\r\n\r\nmd = MyDisposable()\r\nmd.Dispose()\r\n\r\n\r\nclass MyBuffer(System.Buffers.IMemoryOwner):\r\n    __namespace__ = \"MyNamespace\"\r\n\r\n\r\n    def Dispose(self) -\u003e None:\r\n        print(\"Dispose\")\r\n\r\n\r\nmb = MyBuffer()\r\nmb.Dispose()    \r\n```\r\n\r\nconf.json:\r\n```json\r\n{\r\n  \"runtimeOptions\": {\r\n    \"tfm\": \"net6.0\",\r\n    \"framework\": {\r\n      \"name\": \"Microsoft.NETCore.App\",\r\n      \"version\": \"6.0.4\"\r\n    }\r\n  }\r\n}\r\n```\r\n\r\n-   If there was a crash, please include the traceback here.\r\n\r\n```\r\n(venv) root@ca20f043eef5:/t# python demo.py\r\nDispose\r\nTraceback (most recent call last):\r\n  File \"demo.py\", line 21, in \u003cmodule\u003e\r\n    class MyBuffer(System.Buffers.IMemoryOwner):\r\nTypeError: Method 'Dispose' in type 'MyNamespace.MyBuffer' from assembly 'Python.Runtime.Dynamic, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' does not have an implementation.\r\n```\r\n","author":{"url":"https://github.com/phxnsharp","@type":"Person","name":"phxnsharp"},"datePublished":"2022-05-05T20:19:11.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/1783/pythonnet/issues/1783"}