Set active element template
The below code shows how to activate the element template and template level using the template name.
public bool SetActiveElementTemplate()
{
//Get instance of Template manager
Bentley.MstnPlatformNET.Templates.TemplateManager templateManager = Bentley.MstnPlatformNET.Templates.TemplateManager.Instance;
string name = "Linear\\Superelevation\\Super_Section";
//activate element template with active level
int status = templateManager.ActivateElementTemplate(name);
if (status == 0) return true;
else return false;
}