Timestamp with timezone (YYYYMMDDhhmmssffff+zzzz)

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let myTimeStamp = 
    let zone = System.TimeZone.CurrentTimeZone.GetUtcOffset System.DateTime.Now
    let prefix = match (zone<System.TimeSpan.Zero) with | true -> "-" | _ -> "+"
    System.DateTime.UtcNow.ToString("yyyyMMddHHmmssffff") + prefix + zone.ToString("hhss");     

val myTimeStamp : string

val zone : System.TimeSpan

namespace System

Multiple items
[<Struct>]
type DateTime =
  new : ticks: int64 -> unit + 13 overloads
  member Add : value: TimeSpan -> DateTime + 1 overload
  member AddDays : value: float -> DateTime
  member AddHours : value: float -> DateTime
  member AddMilliseconds : value: float -> DateTime
  member AddMinutes : value: float -> DateTime
  member AddMonths : months: int -> DateTime
  member AddSeconds : value: float -> DateTime
  member AddTicks : value: int64 -> DateTime
  member AddYears : value: int -> DateTime
  ...

--------------------
System.DateTime ()
   (+0 other overloads)
System.DateTime(ticks: int64) : System.DateTime
   (+0 other overloads)
System.DateTime(ticks: int64, kind: System.DateTimeKind) : System.DateTime
   (+0 other overloads)
System.DateTime(year: int, month: int, day: int) : System.DateTime
   (+0 other overloads)
System.DateTime(year: int, month: int, day: int, calendar: System.Globalization.Calendar) : System.DateTime
   (+0 other overloads)
System.DateTime(year: int, month: int, day: int, hour: int, minute: int, second: int) : System.DateTime
   (+0 other overloads)
System.DateTime(year: int, month: int, day: int, hour: int, minute: int, second: int, kind: System.DateTimeKind) : System.DateTime
   (+0 other overloads)
System.DateTime(year: int, month: int, day: int, hour: int, minute: int, second: int, calendar: System.Globalization.Calendar) : System.DateTime
   (+0 other overloads)
System.DateTime(year: int, month: int, day: int, hour: int, minute: int, second: int, millisecond: int) : System.DateTime
   (+0 other overloads)
System.DateTime(year: int, month: int, day: int, hour: int, minute: int, second: int, millisecond: int, kind: System.DateTimeKind) : System.DateTime
   (+0 other overloads)

property System.DateTime.Now: System.DateTime with get

val prefix : string

Multiple items
[<Struct>]
type TimeSpan =
  new : ticks: int64 -> unit + 3 overloads
  member Add : ts: TimeSpan -> TimeSpan
  member CompareTo : value: obj -> int + 1 overload
  member Divide : divisor: float -> TimeSpan + 1 overload
  member Duration : unit -> TimeSpan
  member Equals : value: obj -> bool + 2 overloads
  member GetHashCode : unit -> int
  member Multiply : factor: float -> TimeSpan
  member Negate : unit -> TimeSpan
  member Subtract : ts: TimeSpan -> TimeSpan
  ...

--------------------
System.TimeSpan ()
System.TimeSpan(ticks: int64) : System.TimeSpan
System.TimeSpan(hours: int, minutes: int, seconds: int) : System.TimeSpan
System.TimeSpan(days: int, hours: int, minutes: int, seconds: int) : System.TimeSpan
System.TimeSpan(days: int, hours: int, minutes: int, seconds: int, milliseconds: int) : System.TimeSpan

field System.TimeSpan.Zero: System.TimeSpan

property System.DateTime.UtcNow: System.DateTime with get

System.DateTime.ToString() : string
System.DateTime.ToString(provider: System.IFormatProvider) : string
System.DateTime.ToString(format: string) : string
System.DateTime.ToString(format: string, provider: System.IFormatProvider) : string

System.TimeSpan.ToString() : string
System.TimeSpan.ToString(format: string) : string
System.TimeSpan.ToString(format: string, formatProvider: System.IFormatProvider) : string