how to find out null values in .net (like isnull function in VB)

I taken values into Array, from array i want to read data one by one.
i want to find out null values in that array, so that how to read null values in that array.
Is there any method to finding null values (like ISNULL in VB).

help me regarding this.

I think DBNull is what you are looking for (or Nothing).

The function is called IsDBNull