Sort not working in columns

I am getting data in multiple columns of the datagrid and all of them are string type. Filter works well with all of them. I am not able to figure out why sort is not working for the same. Am I missing something

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@enchev assuming these two are the columns and both of them are string type. I have made both of them sortable and filterable. Upon click of sort there are no changes happening on the UI. the data still appears in the random order.

Sorting will be performed in-memory if just the Data is assigned or will be passed to LoadData event if present. If you do not sort your data in LoadData nothing will be sorted.