Search XML from TextBox for particular Items

[AWorkTool]

I am building a tool for my team at work to search a XML file for a particular item and return back the nodes associated with it. I have searched the web to no abounds and was wondering if someone would mind letting me know what I am missing.

Here is my XML:

Visual Basic 4 / 5 / 6 Syntax (Toggle Plain Text)
<?xml version="1.0" encoding="utf-8"?>
<ServiceConfiguration>
  <ServiceName ID="AddNote">
     <Client ID="Opera">
          <Service>Administration</Service>
          <Method>AddNote</Method>
          <Version>1.1</Version>
          <RetryOption>False</RetryOption>
          <qa03queue>Company.Policy.AddNote</qa03queue>
     </Client>
  </ServiceName>
<ServiceName ID="AuthenticateUser">
     <Client ID="Gas Station">
          <Service>Enterprise</Service>
          <Method>AuthenticateUser</Method>
          <Version>1.0</Version>
          <RetryOption>False</RetryOption>
       <qa03queue>Company.Enterprise.AuthenticateUser</qa03queue>
     </Client>

Here is my code... I have a single text box named txtMethod and radio buttons that are selected to help search a node associated with it. Here is what I have...
Visual Basic 4 / 5 / 6 Syntax (Toggle Plain Text)
Private Sub btnSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSearch.Click

Dim ClientRdo As String
        'Radio Button Check on Search
        If rdoOpera.Checked = True Then
            ClientRdo = "Opera"
 
        ElseIf rdoGasStation.Checked = True Then
            ClientRdo = "Gas Station"
 
        Else
            MsgBox("You must choose a client to search the file.")
        End If
 
        'Search(Document)
        Dim xmldoc As New System.Xml.XmlDocument()
        Dim xmlnode As System.Xml.XmlNodeList
        Dim i As Integer
        Dim fs As New System.Xml.XmlTextReader("C:\MyFile.xml")
        xmldoc.Load(fs)
        xmlnode = xmldoc.GetElementsByTagName("Client")
 
'This is the text box that I want to search for "AddNote" or Service ID in the XML
Dim Method As String
        Method = txtMethod.Text
 
 
 
 
        Do Until fs.EOF
'This should find "AddNote" if it is entered into textbox
            xmldoc.SelectSingleNode("//ServiceConfiguration[ServiceName ID='" + Method + "']")
            'This should find either "Opera" or "Gas Station" along with the Service Name ID
            ClientRdo = xmlnode(i).ParentNode.Item(1).InnerText.Trim()
'It will continue to do this till it is found in the XML file
        Loop
 
'Once found, it will display the results of the children in the remaining textboxes
        txtService2.Text = xmlnode(i).ChildNodes.Item(0).InnerText.Trim()
        txtMethod2.Text = xmlnode(i).ChildNodes.Item(1).InnerText.Trim()
        txtVersion.Text = xmlnode(i).ChildNodes.Item(2).InnerText.Trim()
        txtQue.Text = xmlnode(i).ChildNodes.Item(4).InnerText.Trim()

Any help would be greatly appreciated! This is all done in visual studio.