: Always use text/csv for CSV files. This tells the browser what kind of data it is receiving.
In C#, downloading a CSV file from a byte array is a standard task typically handled within an ASP.NET Core or MVC controller. By returning a FileResult , you can signal the browser to treat the incoming byte stream as a downloadable attachment with a specific filename and MIME type. Direct Method: Using the Controller File Method download csv file from byte array c#
: The File() helper automatically sets the Content-Disposition header to attachment , which triggers the "Save As" dialog in the browser instead of trying to display the text directly. : Always use text/csv for CSV files
: If you are generating large CSVs, consider using a MemoryStream instead of a raw byte array to avoid high memory overhead. Generating the Byte Array from Data By returning a FileResult , you can signal
c# - Returning CSV from .NET Core controller - Stack Overflow