You need to add a reference to System.Xml to your project.

In Visual Studio, right-click your project and choose "Add Reference" (it may take a minute for the dialog to appear ... the first time you do this ... faster after that). In the .NET tab of the dialog form, scroll down to System.Xml, select it and click the OK button. That should take care of it.

~~Bonnie



>Hello *.*
>
>I´m builind my first application in .NET and a friend on mine give an exemple, but when I build the project, this message ocurrs:
>
>The type or namespace name 'Xml' does not exist in the namespace 'System.Security.Cryptography' (are you missing an assembly reference?). >
>these are the "using" commands:
>
>using System;
>using System.Collections.Generic;
>using System.Text;
>using System.IO;
>using System.Xml;
>using System.Xml.Schema;
>using System.Windows.Forms;
>using System.Security.Cryptography.Xml;
>using System.Security.Cryptography.X509Certificates;
>
>When I try retype the command the intelinsense don´t show the option "Xml" at System.Security.Cryptography
>
>What can I do to inset this namespace ?
>
>thank you all!!!
>
>Frederico