COMAdminCatalogCollection applications;
            COMAdminCatalog catalog;

            catalog = new COMAdminCatalog();
            applications = (COMAdminCatalogCollection)catalog.GetCollection("Applications");

            applications.Populate();

            string x = "Nome Sistema";
            dynamic servidor = "Caminho Servidor";

            foreach (COMAdminCatalogObject application in applications)
            {
                if (application.Name == x)
                {
                    application.Value["Nome do parametro que estou atras"] = servidor;
                }
             }