Is there a short way to add List<> to List<> instead of looping in result and add new result one by one?

var list = GetViolations(VehicleID); var list2 = GetViolations(VehicleID2); list.Add(list2);
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4 Answers

Use List.AddRange(collection As IEnumerable(Of T)) method.

It allows you to append at the end of your list another collection/list.

Example:

List<string> initialList = new List<string>(); // Put whatever you want in the initial list List<string> listToAdd = new List<string>(); // Put whatever you want in the second list initialList.AddRange(listToAdd);
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Try using list.AddRange(VTSWeb.GetDailyWorktimeViolations(VehicleID2));

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  1. Use Concat or Union extension methods. You have to make sure that you have this declaration using System.Linq; in order to use LINQ extensions methods.

  2. Use the AddRange method.

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Use .AddRange to append any Enumrable collection to the list.