ASP.NET Excel (xlsx) export into HTTP response

I need a very simple solution which is capable of creating an Excel sheet (xlsx) in an ASP.NET project and provide it as a HTTP response. Any free library can be used. Nuget packages are preferred. I tried quite a few of them and spent some time on this topic but I had some issue with each library I tried. So I prefer to hire somebody who know which one is a working solution. What is need is only a piece of code how to generate a sample xlxs file. (It is enough if it has some basic data, basic formatting.) The real business content I will add. These are the requirements: -the library should be free -it should be able to do basic formatting (cell content type, backgound, color, bold font) -the library to be used should not have any limitations regarding data quantity (like limiting the amount of rows for example) -it should be able to save the file to a web stream (into [login to view URL]) -it should generate a valid xlsx file -the file should not be corrupted, Excel should be able to open it without any warnings -we are using .NET Framework 4.8 The last solution I tried was SpreadsheetLight, using below piece of code, but the generated file is corrupted. The only thing I need is a similar piece of code which I can copy here, in place of my current code. You don't have to deliver the full solution. SLDocument sl = new SLDocument(); [login to view URL](2, 2, "I'm going on the Internet super highway!"); [login to view URL](2, 2, [login to view URL]); [login to view URL](); [login to view URL] = "application/[login to view URL]"; [login to view URL]("Content-Disposition", "attachment; filename=" + fileName + ".xlsx"); [login to view URL]([login to view URL]); [login to view URL]();