vb.net - Getting upperbound and lowerbound from a textbox -

i'm trying figure out code project don't understand it. objective write program generates set of 10 random numbers , stores in array (the 10 numbers display in textbox correctly). should have button compute minimum, maximum , average of array. cant seem max , min values of textbox. know people don't post answers , i'm not looking if tell why i'm doing max/min wrong or point in right direction appreciate it. thank you!

private sub button1_click(sender object, e eventargs) handles button1.click       dim randomarray new random()     dim randomnumber integer      = 1 10         randomnumber = randomarray.next(1, 101)         displaynumberstextbox1.appendtext(randomnumber & " ")         displaynumberstextbox1.text = convert.tostring(randomnumber)     next end sub  private sub button2_click(sender object, e eventargs) handles button2.click     dim randomarray new random()     dim randomnumber integer      = 1 10         randomnumber = randomarray.next(1, 101)         displaynumberstextbox1.appendtext(randomnumber & " ")     next      dim min integer     min = displaynumberstextbox1.text.getlowerbound()     displaymintextbox2.text = min end sub 

for starters, see code in button1:

textbox1.appendtext(randomnumber & " ") textbox1.text = convert.tostring(randomnumber) 

the 2nd line negates first. remove it. instead, clear textbox @ beginning of button click handler.

next, in button 2 code goes through , re-creates new set of random numbers, instead of using set created first button. more, @ no point numbers ever stored in array. need array declared outside of either button, in in code button1 set elements of array, can use numbers again in button2 more easily.