public static void AddContentType(this SPList list, SPContentTypeId contentTypeId)
{
SPContentType contentType = list.ParentWeb.AvailableContentTypes[contentTypeId];
if (contentType != null)
{
list.AddContentType(contentType);
}
}
private void ContentTypesAction(SPList list, IEnumerable <SPContentType> contentTypes)
{
foreach (SPContentType contentType in contentTypes)
{
if (!list.ContainsContentTypeWithId(contentType.Id) && list.IsContentTypeAllowed(contentType))
{
list.AddContentType(contentType);
}
}
}