How to reference system.Text.RegularExpressions?

Question

Some time ago I downloaded a bunch of WCF examples from Microsoft and this sample works!
WF_WCF_Samples\WCF\Extensibility\Ajax\WebContentTypeMapper\CS
However, I'd like to modify and add some text manipulation. Why does this code cause a problem?
var p = new System.Text.RegularExpressions.Regex("([^ ]{5,})([^ ]{5,})(?! )");
Error 1 The type or namespace name 'RegularExpressions' does not exist in the namespace 'System.Text' (are you missing an assembly reference?) C:\Users\siegfried\Documents\WinOOP\Examples\WCF\C#\WF_WCF_Samples\WCF\Extensibility\Ajax\WebContentTypeMapper\CS\service\service.cs 26 35 service
I'm using visual studio 2012 update 4.
I've tried adding a reference but I cannot find System.Text in the list of DLLs.
Thanks
Siegfried
siegfried heintze

Answer 1

For reasons I don't understand, LINQPad makes it easy to add System.Text.RegularExpressions.dll while VS makes it very difficult. On my machine, it is indeed a separate DDL in
C:\Windows\Microsoft.NET\Framework\V4.0.30319\System.Text.RegularExpressions.dll
Why you have to use the browse button in VS on the "Add Reference" menu entry and know that directory name is a mystery to me. It sure makes it difficult!
Then I got an error message and had to add System.dll too. I certainly though that that would be added by default. What a surprise (and a pain)!
Anyway, it is working now. Thanks for the help.
Siegfried
siegfried heintze