Usually I just use the ctrl + k, ctrl + d shortcut in Visual Studio and let it format my code for me.
You can customize how Visual Studio code is formatted by choosing Tools → Options → Text Editor → HTML → Format
, , :
<cc1:MediaGallery ID="MediaGalleryControl" runat="server"
AllowUpload="false"
AllowUploadPreview="false"
MediaLibraryName="Downloads"
DisplayActiveContent="true"
DisplayFileCount="true"
TransformationName="Community.Transformations.MediaLibrary"
FooterTransformation="Community.Transformations.MediaLibraryFooter"
HeaderTransformation="Community.Transformations.MediaLibraryHeader"
HideFolderTree="true"
FileIDQueryStringKey="fileid"
/>