What is the best way to deal with DBNull's

Question

I frequently have problems dealing with DataRows returned from SqlDataAdapters. When I try to fill in an object using code like this:

Answer 1

I usually write my own ConvertDBNull class that wraps the built-in Convert class. If the value is DBNull it will return null if its a reference type or the default value if its a value type. Example: - ConvertDBNull.ToInt64(object obj) returns Convert.ToInt64(obj) unless obj is DBNull in which case it will return 0.