public void ProcessFile()
{
var fileUploader = new LargeFileUpload(DroppedFile.Name, DroppedFileStream);
fileUploader.UploadProgressCompleted += OnUploadProgressCompleted;
fileUploader.UploadProgressChanged += OnUploadProgressChanged;
fileUploader.UploadAddress = string.Format("{0}?filename={1}", App.Params.FileUploaderUrl, DroppedFile.Name);
FileUploaders.Add(fileUploader);
fileUploader.UploadFile();
}