vb.net - using toupper and tolower in visual basic -

trying change case of first letter of parsed strings segments. if user enters "john wayne doe" in txtname display "john wayne doe" entered way shows in book message box displays parsed string entered in above example return "john wayne doe" figure logic error since known lot have no idea made error.

    dim name string = txtname.text     name = name.trim     dim names() string = name.split(cchar(" "))     dim firstname string = names(0)     dim middlename string = names(1)     dim lastname string = names(2)      dim firstletters1 string = firstname.substring(0, 1).toupper     dim otherletters1 string = firstname.substring(1).tolower      dim firstletters2 string = middlename.substring(0, 1).toupper     dim otherletters2 string = middlename.substring(1).tolower      dim firstletters3 string = lastname.substring(0, 1).toupper     dim otherletters3 string = lastname.substring(1).tolower      messagebox.show("first name: " & firstname & vbcrlf & "middle name: " & middlename & vbcrlf & "last name: " & lastname) 

try this:

messagebox.show(_     "first name: " & firstletters1 & otherletters1 & vbcrlf & _     "middle name: " & firstletters2 & otherletters2 & vbcrlf & _      "last name: " & firstletters3 & otherletters3) 

string immutable class, toupper , tolower calls create new instances. in message box passing old unprocessed instances.

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update alternatively, can use our old call:

 messagebox.show("first name: " & firstname & vbcrlf & "middle name: " & middlename & vbcrlf & "last name: " & lastname) 

as long before:

firstname = firstletters1 & otherletters1 middlename = firstletters2 & otherletters2 lastname = firstletters3 & otherletters3 

this might better idea on how string's immutability works.