C# MS Office互操作-can'；t发布对RCW的引用

我正在应用程序中使用Microsoft.Office.Interop.PowerPoint控制演示文稿幻灯片的播放。我可以使用代码连接到PowerPoint

PowerPointApp = Marshal.GetActiveObject("PowerPoint.Application") as Microsoft.Office.Interop.PowerPoint.Application;

所有的工作都正常，但我不能使用

此调用仍引发异常：

A first chance exception of type 'System.InvalidCastException' occurred in mscorlib.dll

Additional information: Unable to cast COM object of type 'System.__ComObject' to interface type 'System.Runtime.InteropServices.ComTypes.IConnectionPoint'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{B196B286-BAB4-101A-B69C-00AA00341D07}' failed due to the following error: The application called an interface that was marshalled for a different thread. (Exception from HRESULT: 0x8001010E (RPC_E_WRONG_THREAD)).

我尝试将这两个方法（GetActiveObject和FinalEleaseComObject）包装为：

为了确保从同一个线程调用这两个方法，我得到了相同的异常

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我还尝试在PowerPoint仍在运行时释放引用-在这种情况下，对RCW的引用会毫无例外地释放（但我需要在关闭PowerPoint后释放这些引用）

使用ReleaseComObject而不是FinalReleaseComObject方法。该条规定如下：

用于在使用完Office/PowerPoint对象后释放该对象。然后在Visual Basic中将变量设置为Nothing（在C#中为null），以释放对对象的引用

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它与Outlook相关，但同样的原则也适用于任何Office应用程序

谢谢，但这对我没有帮助-还是一样的问题。已经有无数关于这个的帖子了。

A first chance exception of type 'System.InvalidCastException' occurred in mscorlib.dll

Additional information: Unable to cast COM object of type 'System.__ComObject' to interface type 'System.Runtime.InteropServices.ComTypes.IConnectionPoint'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{B196B286-BAB4-101A-B69C-00AA00341D07}' failed due to the following error: The application called an interface that was marshalled for a different thread. (Exception from HRESULT: 0x8001010E (RPC_E_WRONG_THREAD)).

 App.Current.Dispatcher.Invoke((MethodInvoker)delegate{ ... });`