How to create bookmark using .Net SDK

[#1]

I have a local instance of QlikSense installed.

I am using QlikSense SDK 2.1.1.0 libraries in my .Net web application.

I have tried creating bookmarks but was not successful.

I am using the following C# code,

            IAppField field1 = application.GetAppField("derwew");

            field1.SelectAll();

            IAppField field2 = application.GetAppField("xpaBx");

            field2.SelectValues(new[] { 1, 45, 77 }, toggleMode: false, softLock: false);

            var bookmarkProperties = new BookmarkProperties

            {

                SheetId = thisSheetId,

                //Title = "New Bookmark",

                CreationDate = "2014-10-07T19:43:16.523Z",

                SelectionFields = "derwew, xpaBx"

            };

Questions:

1. I am not sure how to get the name of the name of the app field to be used in GetAppField method.

2. I am not able to use Title for the bookmark in BookmarkProperties. It says it is not a property. Its the same with SDK 2.1.1 and SDK 2.0.1

Thank you.