Question

How to measure time in milliseconds using C#

Answer 1

using System;
 
internal static class DateTimeTools {
    private static readonly System.DateTime Jan1st1970 = new System.DateTime(1970, 1, 1, 0, 0, 0, System.DateTimeKind.Utc);
     
    public static long CurrentUnixTimeMillis() {
        return (long)(System.DateTime.UtcNow - Jan1st1970).TotalMilliseconds;
    }
}
 
public class TimeInMilliseconds
{
    public static void Main(string[] args)
    {
        long startTime = DateTimeTools.CurrentUnixTimeMillis();
 
        for (int i = 0; i < 20000000; i++) ;
 
        long estimatedTime = DateTimeTools.CurrentUnixTimeMillis() - startTime;
 
        Console.WriteLine(estimatedTime);
    }
}
 
 
/*
run:
     
20
    
*/

 

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Answer 2

using System;
using System.Diagnostics;

public class TimeInMilliseconds
{
	public static void Main(string[] args)
	{
		var stopwatch = new Stopwatch();
        stopwatch.Start();
            
        for (int i = 0; i < 20000000; i++) ;
        
        stopwatch.Stop();
            
        var elapsed_time = stopwatch.ElapsedMilliseconds;

		Console.WriteLine(elapsed_time);
	}
}


/*
run:
    
17
   
*/

 

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