string lines3 new string 100 List lt string gt lines2 new List lt string gt lines3 Regex Split s1 s s if lines2 Contains lines3 ToString lines2 AddRange lines3 Distinct ToArray I have checked all the spaces etc but i still get duplicate values in my lines2 List I have to remove my duplicate values here itself

Avoid Adding duplicate elements to a List C#

The Solution to Avoid Adding duplicate elements to a List C# is

You can use Enumerable.Except to get distinct items from lines3 which is not in lines2:

lines2.AddRange(lines3.Except(lines2));

If lines2 contains all items from lines3 then nothing will be added. BTW internally Except uses Set<string> to get distinct items from second sequence and to verify those items present in first sequence. So, it's pretty fast.

~ Answered on 2013-01-21 06:34:51

Avoid Adding duplicate elements to a List C#

The Solution to Avoid Adding duplicate elements to a List C# is

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