How to create excel in C#

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C#

MS-Excel

I want to create the excel file add the data from memory stream from to excel.

What I have tried:

I used the follwing code.

File.Create(filepath).Close();
var memory = new MemoryStream()
byte[] bytes = File.ReadAllBytes(Path.Combine(fullPath, fileName));
memory.Write(bytes, 0, bytes.Length);

it is creating the excel file but when i am trying to open, it is giving messanger "We found problem with some contents in 'filename'. Do you want to us try to recover as much as we can? If you trust the source of this workbook click Yes"