Insert value into a string at a certain position?

Question

i\'m looking to place a value from a text box lets say \"12\" to a certain place in a string temp variable. Then I want to place another value after that say \"10\" but with

Answer 1

You can't modify strings; they're immutable. You can do this instead:

txtBox.Text = txtBox.Text.Substring(0, i) + "TEXT" + txtBox.Text.Substring(i);