如何用C#实现数据库的备份压缩？减少存储空间？

using System;
using System.Data.SqlClient;

string connectionString = "Server=localhost;Database=master;Integrated Security=true;";
string backupFile = @"C:\Backup\MyDB.bak";
string databaseName = "MyDatabase";

using (SqlConnection conn = new SqlConnection(connectionString))
{
    conn.Open();
    string sql = $@"BACKUP DATABASE [{databaseName}] TO DISK = '{backupFile}' 
                    WITH INIT, NAME = '{databaseName} Full Backup', SKIP";

    using (SqlCommand cmd = new SqlCommand(sql, conn))
    {
        cmd.CommandTimeout = 300; // 备份可能耗时较长
        cmd.ExecuteNonQuery();
    }
}

using System.IO;
using System.IO.Compression;

string inputFile = @"C:\Backup\MyDB.bak";
string compressedFile = @"C:\Backup\MyDB.bak.gz";

using (FileStream originalFileStream = new FileStream(inputFile, FileMode.Open, FileAccess.Read))
using (FileStream compressedFileStream = new FileStream(compressedFile, FileMode.Create))
using (GZipStream compressionStream = new GZipStream(compressedFileStream, CompressionMode.Compress))
{
    originalFileStream.CopyTo(compressionStream);
}

File.Delete(inputFile);