gistfile1.txt

 using (var connection = new SqlConnection(ConfigurationManager.ConnectionStrings["DBConnString"].ConnectionString))
{
    connection.Open();
    using (var command = new SqlCommand("SELECT * FROM Table WHERE Id IN ("))
    {
        int count = 0;
        foreach (var keyword in model.Keywords)
        {

            command.Parameters.Add("@P" + count, SqlDbType.NVarChar).Value = keyword;
            command.CommandText += ("@P" + count);
            count++;
        }

        command.CommandText += ")";

        using (var reader = command.ExecuteReader())
        {
            while (reader.Read())
            {

            }
        }
    }
}