removing duplicates in a list with linq

Question

Suppose you have a list of MyObject like this:

public class MyObject
{
  public int ObjectID {get;set;}
  public string Prop1 {get;set;}
}

Answer 1

You could create a custom object comparer by implementing the IEqualityComparer interface:

public class MyObject
{
    public int Number { get; set; }
}

public class MyObjectComparer : IEqualityComparer
{
    public bool Equals(MyObject x, MyObject y)
    {
        return x.Id == y.Id;
    }

    public int GetHashCode(MyObject obj)
    {
        return obj.Id.GetHashCode();
    }
}

Then simply:

myList.Distinct(new MyObjectComparer())