Upload files with vbNET

I want to upload a little txt file from my local Pc to Box folder, I trie to use the documentation, but I can not to get.

I used this:

BoxFile newFile;

// Create request object with name and parent folder the file should be uploaded to
using (FileStream stream = new FileStream(@"C:\\example.pdf", FileMode.Open))
{
	BoxFileRequest req = new BoxFileRequest()
	{
		Name = "example.pdf",
		Parent = new BoxRequestEntity() { Id = "0" }
	};
	newFile = await client.FilesManager.UploadAsync(req, stream);
}

but I am not sure to get the same in VBNET