c# - How can I make a code that will check if a string isn't a number -

the question says all

what tried was

if (textbox1.text != int) {      messagebox.show ("this not proper number.") }

i use button start command. new c# excuse such possibly easy

this number , tell if it's not valid. won't throw exception if it's not valid. it'll return false.

int i;  if(!int.tryparse("your_string_to_try_and_parse", out i)) {     messagebox.show("not number"); }

now drawback tell if it's integer not decimal etc. 5.5 not valid.

Live