Exception message: The connection name 'SqlServices' was not found in the applications configuration or the connection string is empty. code example

Example: Exception message: The connection name 'SqlServices' was not found in the applications configuration or the connection string is empty.

<connectionStrings><add name="DefaultConnection" connectionString="Data Source=YourServername;Initial Catalog=YourDBname;Integrated Security=True;MultipleActiveResultSets=True" providerName="System.Data.SqlClient" /></connectionStrings>