How to implement SQL Distinct keyword in LINQ?

There is a Distinct keyword in LINQ, but not as same as in SQL.
Following is the same implementation for SQL distinct in LINQ

    var distinctItems = items

       .GroupBy(x => x.PropertyToCompare)

       .Select(x => x.First());

http://blog.jordanterrell.com/post/LINQ-Distinct()-does-not-work-as-expected.aspx


HOW TO GET DISTINCT VALUES FROM THE LIST<T> WITH LINQ