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Thanks dp_expert,<br />
Following the link thiis is what ended up working:<br />
<br />
string userName = System.Security.Principal.<wbr />WindowsIde<wbr />ntity.GetC<wbr />urrent(ifI<wbr />mpersonati<wbr />ng : false).Name;<br />
<br />
Thanks again,<br />
Terry
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Thanks dp_expert,
Following the link thiis is what ended up working:

string userName = System.Security.Principal.WindowsIdentity.GetCurrent(ifImpersonating : false).Name;

Thanks again,
Terry

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I am developing a SharePoint Web Part using Silverlight which will be written in C#. &nbsp;Web Part will be used in an Intranet environment. &nbsp;I need to obtain the user's Windows Identity. &nbsp;Is there a way that I can obtain it?<br />
Thanks in advance for your help,<br />
Terry
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I am developing a SharePoint Web Part using Silverlight which will be written in C#.  Web Part will be used in an Intranet environment.  I need to obtain the user's Windows Identity.  Is there a way that I can obtain it?
Thanks in advance for your help,
Terry

SharePoint Silverlight Web Part - How do I obtain Windows Identity

Microsoft Sharepoint is a software platform and family of software products used for collaboration and web publishing combined. These capabilities include developing web sites, portals, intranets, content management systems, search engines, wikis, blogs, and other tools for business intelligence and collaboration. SharePoint has a Microsoft Office-like interface, and it is closely integrated with the Office suite.