ASP.NET Core Image Resize - asp.net

Question

I'm trying to resize imagine with System.Drawing but im taking that file as IFormFile and when i use the System.Drawing its just keep warning me to about that : cannot implicitly convert type 'System.Drawing.Bitmap' to 'Microsoft.AspNetCore.Http.IFormFile' . I need to resize those photos and save them as IFormFile but i dont know how to do that.
public Task<IFormFile> ResizeImagine300x300(IFormFile file)
{
Image image = Image.FromStream(file.OpenReadStream(), true, true);
var newImage = new Bitmap(1024, 768);
using (var g = Graphics.FromImage(newImage))
{
g.DrawImage(image, 0, 0, 1024, 768);
};
return newImage;//the point where i get the error
}
Is it possible to do it in my way?
If its not possible, then which way i should follow?
Thanks for any suggestion
Edit: I wanna return as a IFormFile because i have a method which is uploading those files to my database. here is my method :
public async Task<FileRepo> FileUploadToDatabase(List<IFormFile> files)
{
foreach (var file in files)
{
var fileName = Path.GetFileNameWithoutExtension(file.FileName);
var fileExtension = Path.GetExtension(file.FileName);
_fileRepo = new FileRepo
{
FileName = fileName,
FileExtension = fileExtension,
FileType = file.ContentType,
CreatedDate= DateTime.Now
};
using (var dataStream = new MemoryStream())
{
await file.CopyToAsync(dataStream);
_fileRepo.FileData = dataStream.ToArray();
}
}
return _fileRepo;
}
After that I'm uploading that _fileRepo variable to my database like that :
var File = _fileUploader.FileUploadToDatabase(files);
var FileResult = File.Result;
FileResult.ProductID = ProductID;
_unitOfWorkFR.RepositoryFileRepo.Create(FileResult);