Code can create the directory but throws the exception `UnauthorizedAccessException` while copying the file to a directory - asp.net-core

Question

I am getting UnauthorizedAccessException while copying the file to a directory, inside the wwwroot. However Directory.CreateDirectory(uploadFolderPath); creates the folder.
The code I am using to create the folder and copy the files is shown below.
public string UploadPdfFile(IFormFile file, string folderName)
{
if (file == null || file.Length == 0)
{
return string.Empty;
}
// Define the file path
string uploadFolderPath = Path.Combine(_env.WebRootPath, #"uploads\books", $"{folderName}");
if (!Directory.Exists(uploadFolderPath))
Directory.CreateDirectory(uploadFolderPath);
// Save the file to the drive
using (var stream = new FileStream(uploadFolderPath, FileMode.Create))
{
file.CopyTo(stream);
}
return uploadFolderPath;
}
The error says:
UnauthorizedAccessException: Access to the path 'D:\Project\XX-Pedia\XX-Pedia\wwwroot\Uploads\Books\c1' is denied.
What is the solution for this?
I am running the visual studio in administrative mode.
This is strange because the code can create the folder but couldn't copy the files to the folder.

Answer 1

Turns out that I was missing the actual filename component...
string uploadFolderPath = Path.Combine(_env.WebRootPath, #"uploads\books", $"{folderName}");
if (!Directory.Exists(uploadFolderPath))
Directory.CreateDirectory(uploadFolderPath);
//added this line
string filepath = Path.Combine(uploadFolderPath, file.FileName);
// Save the file to the drive
using (var stream = new FileStream(filepath, FileMode.Create))
{
file.CopyTo(stream);
}