DbParameterCollection does not contain a definition for AddWithValue

Getting above error on the last line of the following code. I'm using `EF Core 1.1`. Trying to follow this suggestion. ``` using Microsoft.EntityFrameworkCore; using System.Collections.Generic; using System.Data; using System.Data.Common; using System.Data.SqlClient; //Visual Studio had greyed out this line suggesting this as unnecessary. var conn = _context.Database.GetDbConnection(); var cmd = conn.CreateCommand(); cmd.CommandType = CommandType.StoredProcedure; cmd.CommandText = "MySproc"; cmd.Parameters.AddWithValue("@MyParameter", 42); ```