C# Writing zeros in MemoryStream

I am using this code to save files in byte arrays in sql database and it works with little text files but when I try with, for example, word document it doesn't work:

public async Task<ICollection<DescriptionFile>> GetDescriptionFiles(List<IFormFile> files, Assignment assignment)
    {
        var descriptionFiles = new List<DescriptionFile>();

        foreach (var file in files)
        {
            if (file != null && file.Length > 0)
            {
                using var stream = new MemoryStream();
                await file.CopyToAsync(stream);

                descriptionFiles.Add(new DescriptionFile()
                {
                    Assignment = assignment,
                    Content = stream.ToArray(),
                    Name = file.FileName,
                    ContentType = file.ContentType,
                });
            }
        }

        return descriptionFiles;
    }

For some reason the value of Content is this : 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

Why are all these 0s appearing?