在.NET Core 2.2中，不支持Always Encrypted。如果需要使用Always Encrypted功能，可以考虑将应用程序升级到.NET Core 3.0或更高版本。

示例代码：

using System;
using System.Data.SqlClient;
using Microsoft.Data.SqlClient;

namespace AlwaysEncryptedDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            string connectionString = "Data Source=(localdb)\\MSSQLLocalDB;Initial Catalog=MyDatabase;Integrated Security=True;Column Encryption Setting=Enabled;";

            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                connection.Open();

                using (SqlCommand command = new SqlCommand("SELECT * FROM Customers", connection))
                {
                    using (SqlDataReader reader = command.ExecuteReader())
                    {
                        while (reader.Read())
                        {
                            string customerId = reader["CustomerId"].ToString();
                            string firstName = reader["FirstName"].ToString();
                            string lastName = reader["LastName"].ToString();

                            Console.WriteLine($"CustomerId: {customerId}, FirstName: {firstName}, LastName: {lastName}");
                        }
                    }
                }
            }
        }
    }
}