Exceptions should not be thrown from property getters

Property getters should be simple operations that are always safe to call. If exceptions need to be thrown, it is best to convert the property to a method.

It is valid to throw exceptions from indexed property getters and from property setters, which are not detected by this rule.

Noncompliant Code Example

Module Module1
    Public Property Foo() As Integer
        Get
            Throw New Exception  ' Non-Compliant
        End Get
        Set(ByVal value As Integer)
            ' ... some code ...
        End Set
    End Property
End Module

Compliant Solution

Module Module1
    Sub SetFoo(ByVal value As Integer)         ' Compliant
        ' ... some code ...
    End Sub
End Module

Exceptions

No issue is raised when the thrown exception derives from or is of type NotImplementedException, NotSupportedException or InvalidOperationException.