The sample code you show in your snapshot is from an old version of the Revit API docs.
This is what it lists today; one single call to Create:
Examples
CopyC#public ElementId CreateRevitLink(Document doc, string pathName)
{
FilePath path = new FilePath(pathName);
RevitLinkOptions options = new RevitLinkOptions(false);// Create new revit link storing absolute path to a file
LinkLoadResult result = RevitLinkType.Create(doc, path, options);return (result.ElementId);
}
Cheers,
Jeremy