using System;

using System.Security.Cryptography;     

​

public class Program

{

    public static void Main()

    {

        using var rsa = new RSACryptoServiceProvider(2048);

        var privateKey = rsa.ExportRSAPrivateKeyPem();

        Console.WriteLine(privateKey);

​

        var publicKey = rsa.ExportRSAPublicKeyPem();

        Console.WriteLine(publicKey);

    }

}