UniformTypeIdentifiers UTType always returns null

Question

I'm trying to get Mime type from downloaded file path.

            var fileNanager = new NSFileManager();
            if (!fileNanager.FileExists(path))
            {
                return null;
            }

            var uti = UniformTypeIdentifiers.UTType.GetType(Path.GetExtension(path), UniformTypeIdentifiers.UTTagClass.FilenameExtension, null);
            var x = uti?.PreferredMimeType;

            if (x == null)
            {
                return "application/octet-stream";
            }
            return x;

Even though there's a PDF file path uti is always null and I can only get result "application/octet-stream" instead of "application/pdf". What did I do wrong?

Answer 1

UniformTypeIdentifiers.UTType.GetType requires file extension without '.' while Path.GetExtension(path) returns a file extension with '.' included.

Removing '.' in advance does the trick.