C# remove entries from list based on a distinct field

 

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  • LINQ's Distinct() on a particular property 17 answers

    • Make propertyBs a HashSet<string> instead of a List<string> , and use the return value of Add to make a decision: 

    var propertyBs = new HashSet<string>();
var res = models.Where(m => propertyBs.Add(m.PropertyB)).ToList();

    When you call Add on hash set, only the addition of the initial item returns true ; all duplicate additions would return false , so their corresponding models would be filtered out.

    I possible solution is using the Linq Group by feature. Take a look into this: Group by in LINQ

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