asp.net - textbox is empty but still showing the count -

i have textbox1 field in asp.net , text area show count of records. want count records split , in textbox1 when textbox1 empty text area showing 1.

here code.

int contacts = textbox1.text.split(',').count(); textarea.text = contacts.tostring(); 

string.split returns @ least 1 string, if pass string.empty 1 string is input string(so in case string.empty).

documentation:

.... if instance does not contain of characters in separator, returned array consists of single element contains instance.

you have check it, f.e. string.isnullorempty(or string.isnullorwhitespace):

int contacts = 0; if(!string.isnullorempty(textbox1.text))     contacts = textbox1.text.split(',').length;