Throw Your own exception in class constructor : Exception « Development « VB.Net Tutorial

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VB.Net Tutorial » Development » Exception 
7.4.12.Throw Your own exception in class constructor
Imports System
  
  Module HelloWorld
    Public Sub Main()
      Try
        Dim big_discount as new Discount(56)
      Catch ex as Exception
        Console.WriteLine(ex.Message)
      End Try
    End Sub
  End Module
  
  Public Class Discount
    Private percent as Integer
    Public Sub New(ByVal percent as Integer)
      Me.percent = percent
      If (percent > 50Then
        Throw New MyException("Discount > 50%")
      End If
    End Sub
  End Class
  
  Public Class MyException
    Inherits Exception
    Public Sub New(ByVal msg as String
      MyBase.New(msg)
    End Sub
  End Class
7.4.Exception
7.4.1.Basics of Visual Basic exception handling
7.4.2.Use properties Message, StackTrace and InnerException
7.4.3.Get Message from Exception
7.4.4.Convert Exception to String
7.4.5.Exception fields
7.4.6.Display Exception Trace
7.4.7.Throw Exception out of a Method
7.4.8.Catch Exception in a function
7.4.9.Set Exception HelpLink
7.4.10.Serializable Exception Inheriting NullReferenceException
7.4.11.Catch divided by zero exception
7.4.12.Throw Your own exception in class constructor
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