arcengine 获得lic 信息

 private void button1_Click(object sender, EventArgs e)
        {

            ESRI.ArcGIS.esriSystem.IAoInitialize aoInitialize = new ESRI.ArcGIS.esriSystem.AoInitializeClass();
            ESRI.ArcGIS.esriSystem.ILicenseInformation licenseInformation = (ESRI.ArcGIS.esriSystem.ILicenseInformation)aoInitialize;

            System.String string_Licenses = null;
            try
            {

                ESRI.ArcGIS.esriSystem.esriLicenseProductCode licenseProductCode = aoInitialize.InitializedProduct();
                System.String string_LicenseProductName = licenseInformation.GetLicenseProductName(licenseProductCode);

                string_Licenses = "This application is initialized with the following product license:" + System.Environment.NewLine + string_LicenseProductName + System.Environment.NewLine + "This application has the following extension licenses checked out:";

                ESRI.ArcGIS.esriSystem.ILicenseInfoEnum licenseInfoEnum = licenseInformation.GetProductExtensions(licenseProductCode);

                licenseInfoEnum.Reset();

                ESRI.ArcGIS.esriSystem.esriLicenseExtensionCode licenseExtensionCode = licenseInfoEnum.Next();

                while (!(System.Convert.ToInt32(licenseExtensionCode) == -1))
                {

                    if (aoInitialize.IsExtensionCheckedOut(licenseExtensionCode) == true)
                    {
                        System.String string_LicenseExtensionName = licenseInformation.GetLicenseExtensionName(licenseExtensionCode);
                        string_Licenses = string_Licenses + System.Environment.NewLine + string_LicenseExtensionName;
                    }

                    licenseExtensionCode = licenseInfoEnum.Next();

                }
                System.Windows.Forms.MessageBox.Show(string_Licenses);

            }
            catch (System.Exception ex)
            {
                System.Windows.Forms.MessageBox.Show(ex.ToString());

            }

        }