Question

This is the code to get the list of divisions and add a custom “Select all” at the top

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IList<Division> divisionList = divisionService.GetAllDivisions();
divisionList.Insert(0, new Division() { Code = "ALL", CodeName = "Select all" });

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Then filter it based on the Code, I get 1 item in newList

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var newList = divisionList.Where(x => x.Code == "01" ).ToList();

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Question is how to select multiple items ans store it in newList, including “Select All”
Getting an empty list with this statement,

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var newList = divisionList.Where(x => x.Code == "01" && x.Code == "02" ).ToList(); 

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Answer 1

I think you want a logical or not a logical and… like this:

var newList = divisionList.Where(x => x.Code == "01" || 
                                      x.Code == "02" || 
                                      x.Code == "All" ).ToList();