check if xmlreader is none

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<span style="font-family:Consolas; color:#2b91af; font-size:x-small <span style="font-family:Consolas; color:#2b91af; font-size:x-small <span style="font-family:Consolas; color:#2b91af; font-size:x-small

<span style="font-family:Consolas; color:#0000ff; font-size:x-small <span style="font-family:Consolas; color:#0000ff; font-size:x-small <span style="font-family:Consolas; color:#0000ff; font-size:x-small <span style="font-family:Consolas; color:#0000ff; font-size:x-small
string




<span style="font-family:Consolas; font-size:x-small

<span style="font-family:Consolas; color:#2b91af; font-size:x-small
XmlReader


<span style="font-family:Consolas; font-size:x-small <span style="color:#000000 Xml = sr.ReadToEnd();



<span style="font-family:Consolas; font-size:x-small <span style="font-family:Consolas; font-size:x-small xmlr =
<span style="font-family:Consolas; color:#2b91af; font-size:x-small <span style="font-family:Consolas; color:#2b91af; font-size:x-small <span style="font-family:Consolas; color:#2b91af; font-size:x-small XmlReader<span style="font-family:Consolas; font-size:x-small <span style="font-family:Consolas; font-size:x-small .Create(<span style="font-family:Consolas; color:#0000ff; font-size:x-small <span style="font-family:Consolas; color:#0000ff; font-size:x-small <span style="font-family:Consolas; color:#0000ff; font-size:x-small new<span style="font-family:Consolas; font-size:x-small <span style="font-family:Consolas; font-size:x-small
<span style="font-family:Consolas; color:#2b91af; font-size:x-small <span style="font-family:Consolas; color:#2b91af; font-size:x-small <span style="font-family:Consolas; color:#2b91af; font-size:x-small StringReader<span style="font-family:Consolas; font-size:x-small <span style="font-family:Consolas; font-size:x-small (Xml.Trim())
<span style="font-family:Consolas; color:#2b91af; font-size:x-small <span style="font-family:Consolas; color:#2b91af; font-size:x-small <span style="font-family:Consolas; color:#2b91af; font-size:x-small <span style="font-family:Consolas; font-size:x-small <span style="font-family:Consolas; font-size:x-small where
sr is <span style="font-family:Consolas; color:#2b91af; font-size:x-small
<span style="font-family:Consolas; color:#2b91af; font-size:x-small
<span style="font-family:Consolas; color:#2b91af; font-size:x-small StreamReader.



<span style="font-family:Consolas; color:#2b91af; font-size:x-small <span style="font-family:Consolas; color:#2b91af; font-size:x-small <span style="font-family:Consolas; color:#2b91af; font-size:x-small <span style="font-family:Consolas; font-size:x-small <span style="font-family:Consolas; font-size:x-small how
to check if xmlr is None?
<span style="font-family:Consolas; font-size:x-small <span style="font-family:Consolas; font-size:x-small


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