How to bind new line in multiline textbox asp.net c#?

Question

I have multiple text box.the values sample is given below.i bind the long descrption in multiple line text box.i bind the value from different tables.

 

Bind using

 

(tbxlongdesc.text = tbxlongdesc.text +dtobjScopeTable.Rows[k][1].ToString())

 

 

now if any line more than 120 characters i split into another line.how to do it

 

 

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