BF2Statistics.SnapshotViewForm.ImportBtn_Click C# (CSharp) Method

        private async void ImportBtn_Click(object sender, EventArgs e)
        {
            // List of files to process
            List<SnapshotFile> Files = new List<SnapshotFile>();
            foreach (ListViewItem I in SnapshotView.Items)
            {
                if (I.Checked)
                    Files.Add(I.Tag as SnapshotFile);
            }

            // Make sure we have a snapshot selected
            if (Files.Count == 0)
            {
                MessageBox.Show("You must select at least 1 snapshot to process.", "Error");
                return;
            }

            // Disable this form, and show the TaskForm
            this.Enabled = false;
            TaskForm.Show(this, "Importing Snapshots", "Importing Snapshots", true, ProgressBarStyle.Continuous, Files.Count);
            TaskForm.Cancelled += (s, ev) =>
            {
                TaskForm.Progress.Report(new TaskProgressUpdate("Cancelling...."));
                ImportTaskSource.Cancel();
            };

            // Setup cancellation
            ImportTaskSource = new CancellationTokenSource();
            CancellationToken CancelToken = ImportTaskSource.Token;

            // Wrap in a Task so we dont lock the GUI
            await Task.Run(() => ImportSnaphotFiles(Files, CancelToken), CancelToken);

            // Update the snapshots found close task form
            BuildList();
            TaskForm.CloseForm();
            this.Enabled = true;
            this.Focus();
            
        }