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Posted 28 May 2008

PetriDish: Multi-threading for performance in C#

, 28 May 2008 CPOL
An investigation into advanced concurrent programming.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace PetriDish
	static class Extensions
		public static string ToNormalDisplay( this DateTime dt )
			return dt.ToString( "yyyy-MM-dd HH:mm:ss" );

		public static string ToNormalInternal( this DateTime dt )
			return dt.ToString( "yyyy-MM-dd'T'HH:mm:ss" );

#if WinForms

		public static string ToPathEllipsis( this string s, int width )
			//string s = @"C:\Program Files\Directory\Subdirectory\filename.extension";
			string copy = String.Copy( s );

			TextRenderer.MeasureText( copy, System.Drawing.SystemFonts.DefaultFont, new Size( width, 0 ),
				TextFormatFlags.ModifyString | TextFormatFlags.PathEllipsis );

			int i = copy.IndexOf( '\0' );
			string r = ( i < 0 ? s : copy.Substring( 0, i ) );


		public static T Modal<T>( this IEnumerable<T> list )
			int count = list.Count();
			if ( count == 0 ) return default( T );

			var sorted = list.OrderBy( o => o );

			return sorted.ElementAt( count / 2 );

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About the Author

Nicholas Butler
United Kingdom United Kingdom

I built my first computer, a Sinclair ZX80, on my 11th birthday in 1980.
In 1992, I completed my Computer Science degree and built my first PC.
I discovered C# and .NET 1.0 Beta 1 in late 2000 and loved them immediately.
I have been writing concurrent software professionally, using multi-processor machines, since 1995.

In real life, I have spent 3 years travelling abroad,
I have held a UK Private Pilots Licence for 20 years,
and I am a PADI Divemaster.

I now live near idyllic Bournemouth in England.

If you would like help with multithreading, please contact me via my website:

I can work 'virtually' anywhere!

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