To remove duplicates based on a field

It's easy to repeat the data in the list result, as long as. dinstinct ().

However, if you want to remove duplicate data based on a field, the above method will not be helpful. We need to rewrite a method. Let's look at the example directly.

[Serializable]    public class HomePageUserModel    {        public int UserID { get; set; }        public string TitleUserName { get; set; }        public string ShowUserName { get; set; }        public DateTime? ExcuteTime { get; set; }    }    [Serializable]    public class HomePageUserModelComparer : EqualityComparer<HomePageUserModel>    {        public override bool Equals(HomePageUserModel x,HomePageUserModel y)        {            if (x == null && y == null)            {                return false;            }            else            {                return x.TitleUserName == y.TitleUserName;            }        }        public override int GetHashCode(HomePageUserModel obj)        {            return obj.TitleUserName.GetHashCode();        }    }

You can call this operation to deduplicate a custom field.

To remove duplicates based on a field