Keyword Search in XML using XML DOM

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C#

XML

DOM

I have an XML file which looks like this.

<<Services>
		<Service>
			<Name>Crypto</Name>
			<Provider>ABC</Provider>
			<Operations>
				<Operation>
					<Name>Encryption</Name>
					<MsgIn>String</MsgIn>
					<MsgOut>float</MsgOut>
				</Operation>
			</Operations>
			<Category Platform=".NET" >SVC</Category>
		</Service>
</Services>

I need to find a user defined keyword in the above xmlfile.
For example
Case 1: if the keyword is "Service" it should return "Name,Provider,Operations,Category"(basically all the child nodes).
Case 2: if the keyword is "Name" it should return "Crypto"(basically text content if node has no child nodes")
Case 3: if the keyword is "Encryption"(text content), it should return "Name"(parent node)

this is the solution i have till now.

<pre lang="c#">

public String[] search(String XMLURL, String keyword)
        {


            XmlDocument xml = new XmlDocument();
            xml.Load(XMLURL);

            XmlNode noderef = xml.DocumentElement;
            String[] result = traverse(noderef, keyword);
            return result;
        }

        static String[] traverse(XmlNode node, String keyword)
        {
            String[] name = new String[100];
            int i=0;
            while (node.Name != keyword)
            {
                if (node.HasChildNodes)
                {
                    XmlNodeList xnlist = node.ChildNodes;
                    foreach (XmlNode xn in xnlist)
                    {
                        return traverse(xn, keyword);
                    }
                }
                else
                {
                    node = node.NextSibling;
                    return traverse(node, keyword);
                }
            }

            if(node.HasChildNodes)
            {
                XmlNodeList xnlistresult= node.ChildNodes;
                foreach(XmlNode xnresult in xnlistresult)
                {
                    name[i] = xnresult.Name;
                    i++;
                }
            return name;
            }
            else if(node.NodeType == XmlNodeType.Element)
            {
                name[0]= node.InnerText;
                return name;
            }
            else
            {
                name[0]=node.Value;
                return name;
            }
        }
    }
}

The above code is working fine for Case 1, but not for Case 2 and 3.
When i debug and if my current node is "Name"(in bold), the property hasChildNodes still comes true, which should be false.
Please let me know what you think of it.
Thanks