New Overload Method Available for String.Concat - available in .Net 4 Framework

A new feature I noticed while doing some prototyping some functionality with Visual Studio 2010, is the new overload method available for the 'String.Concat' method that takes an IEnumerable<T>. I found this to be very useful with LINQ query expressions.

Below is a simple example:

 public static void Main()
        {
            List<Employee> employees = new List<Employee>();

            employees.Add(new employees("John", "Doe"));
            employees.Add(new employees("Jane", "Doe"));
            employees.Add(new employees("John", "Code"));

            string output = String.Concat(employees.Where(employee =>
                          (employee.Surname == "Doe")));

            //write the output to screen
            Console.WriteLine(output);
        }

The Enumerable.Where extension method is called to extract the Employee objects whose 'Surname' property equals "Doe". The result is passed to the Concat<T>(IEnumerable<T>) method and displayed to the console.