Error: WebForms UnobtrusiveValidationMode Requires a ScriptResourceMapping For jQuery in .Net

Open the web config file and you see the below  information

<?xml version="1.0"?>

<configuration>
    <system.web>
      <compilation debug="true" targetFramework="4.5" />
      <httpRuntime targetFramework="4.5" />
    </system.web>
</configuration>
Now you need to add the tags after </system.web>
  <appSettings>
    <add key="ValidationSettings:UnobtrusiveValidationMode" value="None" />
  </appSettings> 
And after adding the tags ,Now web.config shows below info

<?xml version="1.0"?>

<configuration>
    <system.web>
      <compilation debug="true" targetFramework="4.5" />
      <httpRuntime targetFramework="4.5" />
    </system.web>
  <appSettings>
    <add key="ValidationSettings:UnobtrusiveValidationMode" value="None" />
  </appSettings>
</configuration>