vb.net - How to separate paragraphs in a textbox? -

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if have textbox, , want generate paragraph it, makes sense want use linebreaks. idea?

for line break specify environment.newline in 

str = "this line" & environment.newline & " , " & environment.newline

use 2 newline paragraph separation

para =  environment.newline & environment.newline & "my para body" & environment.newline &  environment.newline

put text in textbox

mytxtbox.text = str

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