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![How to fix exception:Unable to cast object of type 'System.DBNull' to type 'System.Byte[]' - Stack Overflow](https://i.stack.imgur.com/oDvZS.png "How to fix exception:Unable to cast object of type 'System.DBNull' to type 'System.Byte[]' - Stack Overflow")
How to fix exception:Unable to cast object of type 'System.DBNull' to type 'System.Byte[]' - Stack Overflow
