C# Programming/Keywords/double

The double keyword is used in field, method, property, and variable declarations and in cast and typeof operations as an alias for the .NET Framework structure System.Double. That is, it represents an IEEE 754, 64-bit signed binary floating point number whose value is negative 0, positive 0, negative infinity, positive infinity, not a number, or a number ranging either from $-5.0\times 10^{-324}$ to $-1.79\times 10^{308}$ or from $5.0\times 10^{-324}$ to $1.79\times 10^{308}$.

C# Keywords
abstract as base bool break byte case catch char checked class const continue decimal default delegate do double else enum event explicit extern false finally fixed float for foreach goto if implicit in int interface internal is lock long namespace new null object operator out override params private protected public readonly ref return sbyte sealed short sizeof stackalloc static string struct switch this throw true try typeof uint ulong unchecked unsafe ushort using var virtual void volatile while
Special C# Identifiers (Contextual Keywords)
add alias async await dynamic get global nameof partial remove set value when where yield
Contextual Keywords (Used in Queries)
ascending by descending equals from group in into join let on orderby select where