private void ContextMenuContainerOnImportClicked(object sender, EventArgs eventArgs)
{
var openFileDialog = new OpenFileDialog();
openFileDialog.Filter = "Map Files (.xml .zip)|*.xml;*.zip|Xml Files (.xml)|*.xml|Zip Files (*.zip)|*.zip|All Files (*.*)|*.*";
openFileDialog.Multiselect = true;
var showDialog = openFileDialog.ShowDialog();
if (showDialog != null && showDialog.Value && openFileDialog.Files.Any())
{
Ref.ImportFiles(openFileDialog.Files.ToArray());
}
}