SaveTemplate

// Request all the templates as shown in linked code
DocuSignWeb.EnvelopeTemplateDefinition[] response = <templates request>;
foreach (DocuSignWeb.EnvelopeTemplateDefinition def in response)
{
    Console.WriteLine("Retrieved template definition with ID {0}", def.TemplateID);
    // Request the template specified by the template ID
    DocuSignWeb.EnvelopeTemplate template = _apiClient.RequestTemplate(def.TemplateID,
        true);
    // Modify the name of the template
    template.EnvelopeTemplateDefinition.Name = "Modified name";
    // Save the template back to the account
    DocuSignWeb.SaveTemplateResult result = _apiClient.SaveTemplate(template);
    // Confirm that the save operation succeeded
    Console.WriteLine("\tSaved template? {0}", result.Success);
}