How can I show \"√\" (tick symbol) in label text?
This code will do it for you:
LblTick.Text = ((char)0x221A).ToString();
Edit:
or even easier:
lblTick.Text = "\u221A";
Edit 2:
And, as pointed out in a comment, that code (221A) is actually a square root symbol, not a tick. To use the true tick mark, you can use the following:
lblTick.Text = "\u2713";
or for a heavy tick mark, you can use the following (but you may get font issues with this one):
lblTick.Text = "\u2714";
(Credit to @Joey for that comment!)