namespace WinFormsApp1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
if (Environment.OSVersion.Platform == PlatformID.Win32NT)
{
textBox1.Text = "yes";
}
else
{
textBox1.Text = "no";
}
}
}
}
/*
* run:
*
* yes
*
*/