using System;

using System.Reflection;

using System.Drawing.Imaging;

​

public class Program

{

    public static void Main()

    {

        var t = typeof(ImageCodecInfo);

        var m = t.GetMethod("GetImageEncoders", BindingFlags.Public | BindingFlags.Static);

        var c = m.Invoke(null, Array.Empty<object>()) as Array;

        var f1 = t.GetProperty("CodecName");

        var f2 = t.GetProperty("FormatID");

        object codec = null;

        for (var i = 0; i < c.Length; i++)

        {

            codec = c.GetValue(i);

            if (Object.Equals(f2.GetValue(codec), ImageFormat.Jpeg.Guid))

                break;

        }

​

        var t2 = typeof(EncoderParameters);

        var e = Activator.CreateInstance(t2, new object[] { 1 });

        var f3 = t2.GetProperty("Param");

        var t3 = typeof(EncoderParameter);

        var e1 = Activator.CreateInstance(t3, new object[] { codec, 30L });

        f3.SetValue(e, e1, new object[] { 0 });

    }

}