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'Is' operand of type 'typename' can only be compared to 'Nothing', because 'typename' is a nullable type

A variable declared as nullable has been compared to an expression other than Nothing by using the Is operator.

Error ID: BC32127

To correct this error

  1. To compare a nullable value type to an expression other than Nothing by using the Is operator, call the GetType method on the nullable value type and compare the result to the expression, as shown in the following example.
VB
Dim number? As Integer = 5  

If number IsNot Nothing Then  
  If number.GetType() Is Type.GetType("System.Int32") Then

  End If  
End If  

See also