how to check a node whether exist before item("name") under System.Xml.XmlNode?

[EDN Admin]

node.Item("SendingTime") will get error if not exist in xml file
if not knowing the structure or path in xml file of specific node
how to check whether exist
<pre class="prettyprint node = new System.Xml.XmlNode
node.Item("SendingTime")[/code]
<br/>

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