ERROR: Operator '=' is not defined for type 'DBNull' ...

Operator '=' is not defined for type 'DBNull' and string "Option".

I get this above mentioned error while running the application and the following is the code where I get this error.

If dr("Option") = "Option1" Then
...
...
...
End If

I know this happens when there is no record in the DB and has a value 'NULL". But I don't know how to handle this? Please guide me. Thank you!

Code:

---

If dr("Option") isnot DBNull.Value andalso dr("Option") = "Option1" Then
.....

End If

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