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c#listexcept

Differencing Two String Lists in C#

I am trying to create a string list that contains all of the items that are different between List A and List B. I have the following code, and I feel that I am close, but I am getting syntax errors on the last line. Any help would be appreciated:

 List<string> ListA = new List<string>(textBox_CompareListA.Text.Split(delimiterChars, StringSplitOptions.RemoveEmptyEntries));
 List<string> ListB = new List<string>(textBox_CompareListB.Text.Split(delimiterChars, StringSplitOptions.RemoveEmptyEntries));

 List<string> DifferencesList = ListA.Except(ListB, StringComparer.OrdinalIgnoreCase).Union(ListB.Except(ListA, StringComparer.OrdinalIgnoreCase));

Here is the error: http://screencast.com/t/Y8S9LC2Y

Syntax Error

Solution

  • You should try calling Enumerable.ToList to get the List from your query expression.

    List<string> DifferencesList = ListA.Except(ListB, StringComparer.OrdinalIgnoreCase).Union(ListB.Except(ListA, StringComparer.OrdinalIgnoreCase)).ToList();