[sysadmin]

It seems this will not change anytime soon since they are still using 64bit long double double for variable structure.

This is straight from MS Visual Studio website:

Double Structure
Represents a double-precision floating point number.

For a list of all members of this type, see Double Members.

System.Object
System.ValueType
System.Double

[Visual Basic]
<Serializable>
Public Structure Double
Implements IComparable, IFormattable, IConvertible
[C#]
[Serializable]
public struct Double : IComparable, IFormattable, IConvertible
[C++]
[Serializable]
public __value struct Double : public IComparable, IFormattable,
IConvertible
[JScript] In JScript, you can use the structures in the .NET Framework, but you cannot define your own.

Thread Safety
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Remarks
The Double value type represents a double-precision 64-bit number with values ranging from negative 1.79769313486232e308 to positive 1.79769313486232e308, as well as positive or negative zero, PositiveInfinity, NegativeInfinity, and Not-a-Number (NaN).