The “&” character breaks Data that are stored in the web.config

//////////////// Inside the web.config file

Before

<appSettings>

<add key="Key" value="https://{s}.google.com/vt/lyrs=s&x={x}&y={y}&z={z}" />

  </appSettings>

After

<appSettings>

   <add key="Key" value="https://{s}.google.com/vt/lyrs=s&amp;x={x}&amp;y={y}&amp;z={z}" />  

  </appSettings>