Remove duplicates from list of object

Question

I have MyObject with field: id, a, b, c, e, f and I have List with 500 000 items, now how can I remove all duplicate items with of the same value of the parameter a, c, f? <

Answer 1

Code from this link worked great for me. https://nishantrana.me/2014/08/14/remove-duplicate-objects-in-list-in-c/

public class MyClass
{
public string ID { get; set; }
public string Value { get; set; }

}

List myList = new List();
var xrmOptionSet = new MyClass();
xrmOptionSet.ID = "1";
xrmOptionSet.Value = "100";
var xrmOptionSet1 = new MyClass();
xrmOptionSet1.ID = "2";
xrmOptionSet1.Value = "200";
var xrmOptionSet2 = new MyClass();
xrmOptionSet2.ID = "1";
xrmOptionSet2.Value = "100";
myList.Add(xrmOptionSet);
myList.Add(xrmOptionSet1);
myList.Add(xrmOptionSet2);

// here we are first grouping the result by label and then picking the first item from each group
var myDistinctList = myList.GroupBy(i => i.ID)
.Select(g => g.First()).ToList();