private void button1_Click(object sender, EventArgs e)
{
JsonPref j = new JsonPref();
int[] aaa = new int[] { 78, 9, 12 };
double[] bbb = new double[] { 0.7, 0.01, 0.12 };
string[] ccc = new string[] { "eee", "sfskjbF", "13" };
j.SetIntArray("aa", aaa);
j.SetDoubleArray("bb", bbb);
j.SetStringArray("cc", ccc);
MessageBox.Show(j.ToJson());
}