@lamfab 90MB is abnormally big MS Word document. I suspect even MS Word hangs upon loading it. Unfortunately, there is no way to partially load the document. however, you can use LoadOptions.TempFolder property to decrease the amount of allocated memory.
There is a similar property for saving - SaveOptions.TempFolder and SaveOptions.MemoryOptimization, which allow to decrease memory consumption while saving large documents.
@yogeshg Could you please share your document for testing? We will check it and provide you more information. But, I suspect, we will not be able to help you much in this case. As I already mentioned 90MB is abnormally huge document. It is not recommended to use such large documents.