NullableTypes 1.2

NullableTypes for .NET are a very reliable and efficient version of built-in value-types that can be Null. NullableTypes pass more than 800 differents test cases and have close-to-optimal efficiency as built-in value-types. They may be used every time you need to store a Null value in a .NET built-in value-type.

Types implemented by NullableTypes are: NullableBoolean, NullableByte, NullableInt16, NullableInt32, NullableInt64, NullableSingle, NullableDouble, NullableDecimal, NullableString and NullableDateTime.

Helper functions provide seamless integration with Windows and ASP.NET user controls and with ADO.NET.

NullableTypes will let you write code like this:

public sealed class Order{
public int OrderID {get {/*...*/}}
public int CustomerID {get {/*...*/}}
public NullableDateTime RequestedDeliveryDate {get {/*...*/}}
// remaining members elided for clarity
}

where RequestedDeliveryDate can be either NullableDateTime.Null or a valid DateTime value.

The property RequestedDeliveryDate.IsNull tests if the date is Null, and when it is not Null the property RequestedDeliveryDate.Value returns a valid DateTime value.