How can I get the WKID??

[JoshV]

I'm hoping to find a list of the Spatial References and their WKID.  I know I have seen this before but am having trouble finding it again.  Below is sample code from the Resource center on how to change the projection of the map.  I need to find the WKID of other spatial references to use.

Many thanks

<esri:Map.Extent>
                <esri:Envelope XMin="661140" YMin="-1420246" XMax="3015668" YMax="1594451" >
                    <esri:Envelope.SpatialReference>
                        <esri:SpatialReference WKID="26777"/>
                    </esri:Envelope.SpatialReference>
                </esri:Envelope>
            </esri:Map.Extent>

[DarinaTchountcheva]

http://help.arcgis.com/en/webapi/silverlight/help/index.html

Look under General Reference/Coordinate system ids

[JoshV]

http://help.arcgis.com/en/webapi/silverlight/help/index.html

Look under General Reference/Coordinate system ids

Thanks, this worked for me http://resources.esri.com/help/9.3/arcgisserver/apis/rest/pcs.html