How To: Measure execution time in C#

public static TimeSpan GetDuration(Stopwatch sw, ThreadStart method)
{
	sw.Reset();
	sw.Start();
	method();
	sw.Stop();
	return sw.Elapsed;
}

IList dataObjects = GetObjects(); // execution time should be tested

foreach (DataObject do in dataObject)
{
}

IList dataObjects = null;
Stopwatch sw = new Stopwatch();
Console.WriteLine("GetObjects executed in {0}", GetDuration(sw, delegate() {

dataObjects = GetObjects();

}));
foreach (DataObject do in dataObject)