How to fix error WebForms UnobtrusiveValidationMode requires a ScriptResourceMapping for 'jquery'. Please add a ScriptResourceMapping named jquery(case-sensitive).

More Info:
WebForms UnobtrusiveValidationMode requires a ScriptResourceMapping for 'jquery'. Please add a ScriptResourceMapping named jquery(case-sensitive).
I am getting this error on visual studio 2012 when running custom validator

One way to fix it is to add the following to your web.config
  </system.web>
  <appSettings>

  <add key="ValidationSettings:UnobtrusiveValidationMode" value="None" />

  </appSettings>