how To Type Uppercase String in windows phone TextBox Wpf c#

Question

how To Type Uppercase String in windows phone TextBox Wpf c#.

 

I tried it on KeyDown Event. 

 

void TxtPanno_KeyDown(object sender, KeyEventArgs e)

{

 

TxtPanno.Text = TxtPanno.Text.ToUpper();  //1.

TxtPanno.Text= CultureInfo.CurrentCulture.TextInfo.ToUpper(TxtPanno.Text); //2.

Regex.Replace(TxtPanno.Text, "^[A-Z]", m => m.Value.ToUpper()); //3.

}

 

But Problems is that.

 

Cursor always go to leftside.