ASP.NET text box lines disappear

when i try to dynamicly change the text of a textbox, if there is a line break, \r\n , all the text after the line break disappears including the line break sign. only single lines are updated correctly. the textbox is set to MultiLine TextMode.

w开发者_C百科hat could cause such behaviour ?

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You have to use vbCrLf for new lines.

Example :

TextBox1.Text = "First Line " & vbCrLf & "Second Line"