DbContext constructor override to accept a standard ADO.NET connection string. In this case RamsCore was the name of our EF context.

gistfile1.cs

        /// <summary>
        /// Create a new context with the specified named connection string from the application configuration
        /// </summary>
        /// <param name="connectionStringName"></param>
        public RamsCore(string connectionStringName)
            : base("name=RamsCore")
        {
            if (string.IsNullOrWhiteSpace(connectionStringName))
                throw new ArgumentNullException("connectionStringName", "The name of a standard connection string in the config file must be supplied");

            var configurationConnectionString = ConfigurationManager.ConnectionStrings[connectionStringName];

            if ((configurationConnectionString == null) || (string.IsNullOrWhiteSpace(configurationConnectionString.ConnectionString)))
                throw new InvalidOperationException("The connection string '" + connectionStringName + "' was not found in the configuration file or did not specify a connection string.");

            _connectionString = configurationConnectionString.ConnectionString;
            Database.Connection.ConnectionString = _connectionString;

            LoupeCommandInterceptor.Register();
        }