I work on asp.net core 2.2 web API using C# language
I need to rewrite function below with best syntax and with best practice
web API below get Excel file from upload and return Excel file
it working without any issue but I need to rewrite it with best syntax and practice
some points I need to changes :
concatenate path is best thing using
are streaming using correctly
are memory copying file is correct
Attachment: csharp_code.zip