I try label1.Text.Remove(1,2);
but it doesn't work.
.
Can anyone help me?
Remove
returns new string, does not modify current one, so you need to assign it to label:
label1.Text = label1.Text.Remove(1,2);
label1.Text is a string and strings are immutable (they cannot change). Think of it as an array of chars. You can't resize arrays without asking for new memory.
string.Remove returns a new, modified string. Simply do label1.Text = label1.Text.Remove(1,2);