//Get the ArcGIS install location
string sInstall = ESRI.ArcGIS.RuntimeManager.ActiveRuntime.Path;
//Load the ESRI.ServerStyle file into the SymbologyControl
axSymbologyControl1.LoadStyleFile(sInstall + "\\Styles\\ESRI.ServerStyle");
原文：http://www.cnblogs.com/gisoracle/p/4820150.html