Download file in ASP.NET MVC core

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C#

MVC

ASP.NET-Core

i am unable to download a file in asp.net core. i try some codes but it's not work for me and also i don't get error in my code. can any one suggest me the solution.

What I have tried:

[HttpGet]
public FileStreamResult Download()
{
    string filename = "test.pdf";
    string filepath = _hostingEnvironment.WebRootPath + "\\Doc\\download";
    string fullName = Path.Combine(filepath, filename);
    return File(new FileStream(fullName, FileMode.Open), "application/pdf", filename);
}