Creating an Instance of a Stopwatch C# with Example

A Stopwatch instance can measure elapsed time over several intervals with the total elapsed time being all 
individual intervals added together. This gives a reliable method of measuring elapsed time between two or more 
events. 
Stopwatch stopWatch = new Stopwatch(); 
stopWatch.Start(); 
double d = 0; 
for (int i = 0; i < 1000 * 1000 * 1000; i++) 
{ 
 

d += 1; 
} 
stopWatch.Stop(); 
Console.WriteLine("Time elapsed: {0:hh\\:mm\\:ss\\.fffffff}", stopWatch.Elapsed); 
Stopwach is in System.Diagnostics so you need to add using System.Diagnostics; to your file.