IDbConnection (InsertAll<Orders>)

IDbConnectionInsertAllOrders.cs

// Create a list
var orders = new List<Order>();

// Add each item
orders.Add(new Order { CustomerId = 10045, Quantity = 1, ProductId = 24 });
orders.Add(new Order { CustomerId = 10045, Quantity = 4, ProductId = 27 });

// More orders here

// Call the InsertAll
using (var connection = new SqlConnection(connectionString))
{
    connection.InsertAll<Order>(orders);
}