# Jay discusses the use of partial classes in Windows Forms 2.0
This new feature, which isn't limited to Windows Forms, allows a single class to extend across multiple files, isn't limited to Windows Forms but the designer-generated code is just screaming out for a solution like this.

Jay writes:

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    <span deactivatedstyle="FONT-FAMILY: Tahoma"> <b> <a id="viewpost.ascx_TitleUrl" href="http://blogs.msdn.com/jaybaz_ms/archive/2004/04/28/122392.aspx">Winforms designed code and C# partial classes</a> </b> </span>


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    <span style="FONT-FAMILY: Tahoma"> _In Whidbey, the WinForms designer takes advantage of a new C# language feature called “_ [ _partial classes_ ](https://www.google.com/search?sourceid=navclient&ie=UTF-8&oe=UTF-8&q=C%23+partial+classes) _”.<span style="mso-spacerun: yes">  </span>This allows them to pull out the designer generated code into a separate file.<span style="mso-spacerun: yes">  </span>It has several advantages...<br style="mso-special-character: line-break" />_ </span>

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