c# - How to check for existence of an element with XElement? -

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Information in this code Before I select it, I am trying to check the existence of the rdfs: range element. I do this to avoid the possible tap reference exception at runtime 

  Private Readonly XNamespace rdf = "http://www.w3.org/1999/02/22-rdf-syntax- Ns # "; Private Redoni XNamespace rdfs = "http://www.w3.org/2000/01/rdf-schema#"; Private readonly exhibit otology; Public listing & lt; MetaProperty & gt; Metaportiques {Receive (Select the new Metapapti with P. Elements (RdF + "Property" in Otolology} {About = P. Feature (About "RDF +"). Value, Name = P. Element (RDFS + "Labels) ") Value, range = p.Elements (rdfs +" range "). Calculation () == 1? P.Element (rdfs +" range "). Attribute (Rdf +" resource "). Value: null}}. ToList ();}}

This is kind of annoying to me, what I really want to do is something like this: 

  p.HasElements ( Rdfs + "range")? Property (rdfs + "ray Value (rdf + "resource"). Value: Nil

Although there is no hashelment (string element name) the method is not available.

I think that I can make a method extension to do this, but is I wondering if there is something already created or if there are other ways to do this?

< P>

is the only basic thing, but the neater 

  Returns (in Elephant by P. Elements (rdf + " Property ") XRa Select nge = p.Element (rdfs + "range") Select new metapoopy {about {= p. Specialty (about "RDF +"). Value, name = p. Element (rdfs + "label"). Value, Comment = P.Element (rdfs + "Comment"). Value, range uriy = xrange == tap? Zero: xRange.Attribute (rdf + "Resources"). Values}). ToList ();

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