Web.config

<?xml version="1.0"?>
<configuration>
  <!--
    For a description of web.config changes see http://go.microsoft.com/fwlink/?LinkId=235367.

    The following attributes can be set on the <httpRuntime> tag.
      <system.Web>
        <httpRuntime targetFramework="4.8" />
      </system.Web>
  -->
  <connectionStrings>
    <add name="studentformConnectionString" connectionString="Data Source=(localdb)\MSSQLLocalDB;Initial Catalog=studentform;Integrated Security=True;Encrypt=False"
      providerName="System.Data.SqlClient" />
  </connectionStrings>
  <system.web>
    <compilation debug="true" targetFramework="4.8"/>
    <pages controlRenderingCompatibilityVersion="4.0"/>
  </system.web>
</configuration>