Debugging problem with Visual Studio 2015

• Breakpoint on line
  
  C#

  System.Xml.Linq.XElement element1 = System.Xml.Linq.XElement.Parse(xml1);

  
  is not hit at all
• Breakpoint on line
  
  C#

  System.Xml.Linq.XElement element2 = System.Xml.Linq.XElement.Parse(xml2);

  
  is hit correctly
• Using QuickWatch on element1 I get
  

  error CS0103: The name 'element1' does not exist in the current context

• Using QuickWatch on element2 works correctly
• Using QuickWatch on xml1 gives
  

  error CS0103: The name 'xml1' does not exist in the current context

• Using QuickWatch on xml2 works correctly
• The loop in the end is iterated three times but the System.Diag... line is not executed at all

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            string xml1 = @"<hostgroup id=""2080"">
    <instance_id>1</instance_id>
    <hostgroup_name>Avanade-Hypervisors</hostgroup_name>
    <members>
      <host id=""2061"">
        <host_name>ZACN-PSPR-HVR13</host_name>
      </host>
      <host id=""2062"">
        <host_name>ZACN-PSPR-HVR14</host_name>
      </host>
      <host id=""2063"">
        <host_name>ZACN-PSPR-HVR15</host_name>
      </host>
    </members>
</hostgroup>";

            string xml2 = @"<hoststatuslist>
 <hoststatus id=""49294"">
    <host_id>2061</host_id>
    <name>ZACN-VSPR-WAP02</name>
    <display_name>ZACN-PSPR-HVR13</display_name>
    <alias>management_servers</alias>
    <status_update_time>2015-09-19 08:00:31</status_update_time>
    <last_state_change>2015-09-18 19:25:06</last_state_change>
    <last_hard_state_change>2015-09-16 18:18:04</last_hard_state_change>
    <last_time_up>2015-09-19 08:00:31</last_time_up>
    <last_time_down>2015-09-18 19:25:06</last_time_down>
  </hoststatus>
<hoststatus id=""49294"">
    <host_id>2062</host_id>
    <name>ZACN-VSPR-WAP02</name>
    <display_name>ZACN-PSPR-HVR14</display_name>
    <alias>linux_servers</alias>
    <status_update_time>2015-09-19 06:00:31</status_update_time>
    <last_state_change>2015-09-18 19:25:06</last_state_change>
    <last_hard_state_change>2015-09-16 18:18:04</last_hard_state_change>
    <last_time_up>2015-09-19 08:00:31</last_time_up>
    <last_time_down>2015-09-18 19:25:06</last_time_down>
  </hoststatus>
<hoststatus id=""49294"">
    <host_id>2063</host_id>
    <name>ZACN-VSPR-WAP02</name>
    <display_name>ZACN-PSPR-HVR15</display_name>
    <alias>localhost</alias>
    <status_update_time>2015-09-19 09:00:31</status_update_time>
    <last_state_change>2015-09-18 19:25:06</last_state_change>
    <last_hard_state_change>2015-09-16 18:18:04</last_hard_state_change>
    <last_time_up>2015-09-19 08:00:31</last_time_up>
    <last_time_down>2015-09-18 19:25:06</last_time_down>
  </hoststatus>
</hoststatuslist>";

            System.Xml.Linq.XElement element1 = System.Xml.Linq.XElement.Parse(xml1);

            System.Xml.Linq.XElement element2 = System.Xml.Linq.XElement.Parse(xml2);

            var querya = from item1 in element1.Descendants("host")
                         join item2 in element2.Descendants("hoststatus")
                         on item1.Attribute("id").Value equals item2.Elements("host_id").First().Value
                         select new
                         {
                             Host = item2.Elements("display_name").First().Value,
                             UpTime = item2.Elements("last_time_up").First().Value,
                             Alias = item2.Elements("alias").First().Value
                         };

            foreach(var a in querya)
            {
                System.Diagnostics.Debug.WriteLine(a.Host);
            }
        }