Reading registry keys using WMI

ConnectionOptions oConn = new ConnectionOptions();
System.Management.ManagementScope scope = new System.Management.ManagementScope(@"\\" +hostname + @"\root\cimv2", oConn);

scope.Connect();
ManagementClass registry = new ManagementClass(scope, new ManagementPath("StdRegProv"), null);
ManagementBaseObject inParams = registry.GetMethodParameters("GetStringValue");
inParams["sSubKeyName"] = "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\.NETFramework";
inParams["sValueName"] = "InstallRoot";


ManagementBaseObject outParams = registry.InvokeMethod("GetStringValue", inParams, null);

if (outParams.Properties["sValue"].Value != null)
{
 output = outParams.Properties["sValue"].Value.ToString();

}