目的：
The purpose of this sample is to show how to use a REST server object extension (SOE) that has one subresource and several properties. This sample also includes custom property pages for ArcMap and ArcGIS Manager.
The subresource, called layers, is a list of all layers accessible through the associated map service. The SOE has several properties that affect its behavior at run time, such as layerType, which dictates the types of layers the layers subresource will return. Other properties exist to showcase use of a property page in ArcMap and ArcGIS Server Manager.
