Datatype Question

[twistedm1nd]

internal struct data
{
internal DateTime time_stamp;
internal double duration_good;
internal int count_good;
internal int count_bad;
internal double value_sum;
internal double value_sum2;
internal double? value_min;
internal DateTime? value_min_timestamp;
internal double? value_max;
internal DateTime? value_max_timestamp;
}

The struct works fine when used but
What kind of a decleration is DateTime? or double?

I'm using .NET framework v2 beta.
Thanks

 

[twistedm1nd]

lol i just discovered nullable types , didnt know they existed.

// Nullable Type Example
int? x;
if (x != null)
Console.WriteLine(x.Value);
else
Console.WriteLine("Undefined");