Int32.Parse Method Converts string to 32-bit signed integer equivalent.

 

Module ParseInt32
   Public Sub Main()
      Convert(" +809 ")
   End Sub

   Private Sub Convert(value As String)
      Try
         Dim number As Integer = Int32.Parse(value)
         Console.WriteLine("Converted '{0}' to {1}.", value, number)
      Catch e As FormatException
         Console.WriteLine("Unable to convert '{0}'.", value)
      End Try
   End Sub
End Module

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Int32.Parse Method Converts string to 32-bit signed integer equivalent. : Integer « Data Types « VB.Net

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