سلام
private void button12_Click(object sender, EventArgs e)
{
if (button12.Text == "EN")
{
System.Globalization.CultureInfo farsi = new System.Globalization.CultureInfo("fa-IR");
InputLanguage.CurrentInputLanguage = InputLanguage.FromCulture(farsi);
textBox1.RightToLeft = RightToLeft.Yes;
text_ri_to_let(textBox1);
button12.Text = "FA";
}
else
{
System.Globalization.CultureInfo english = new System.Globalization.CultureInfo("en-US");
InputLanguage.CurrentInputLanguage = InputLanguage.FromCulture(english);
textBox1.RightToLeft = RightToLeft.No;
text_ri_to_let(textBox1);
button12.Text = "EN";
}
}