Using EPPlus with a MemoryStream

Question

I am using EPPlus to generate an XLSX file in C#. As soon as I instantiate the ExcelPackage with a memory stream - I get the error:

\"A disk error occ

Answer 1

I was dealing with the same error, but none of the other answers provided any help.

In the end, the problem was solved after adding this code before trying to open the file:

Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);

It seems that the root cause was that EPPlus could not open the ZIP because of a missing code page. I got this to work thank to this StackOverflow answer.