I did it myself with FileForm Method. First You Have to Add string property in User Class(https://docs.microsoft.com/en-us/aspnet/core/security/authentication/add-user-data?view=aspnetcore-3.0&tabs=visual-studio). public string Avatar { get; set; } and then, update the Manage/Index files by following the documentation. Now, How to create the file upload system? I did like the code below. but if i need to change something for security, please don't forget to help. if (Input.Avatar != null) { string existfile = Path.Combine(hostingEnvironment.WebRootPath, "uploads", user.Avatar); System.IO.File.Delete(existfile); } var uploads = Path.Combine(hostingEnvironment.WebRootPath, "uploads", "avatar"); var filePath = Path.Combine(uploads, fileName); this.Image.CopyTo(new FileStream(filePath, FileMode.Create)); user.Avatar = fileName; // Set the file name GetUniqueFileName Class after the PostAsync class: private string GetUniqueName(string fileName) { fileName = Path.GetFileName(fileName); return Path.GetFileNameWithoutExtension(fileName) + "_" + Guid.NewGuid().ToString().Substring(0, 4) + Path.GetExtension(fileName); } You also have to add the IWebHostEnvironment dependency injection and update the cshtml form with multipart/form-data enctype. Don't forget to follow the .net documentation rules also. Good Luck!