TimeZoneInfo.ClearCachedData Method
Definition
Important
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Clears cached time zone data.
public:
static void ClearCachedData();
public static void ClearCachedData ();
static member ClearCachedData : unit -> unit
Public Shared Sub ClearCachedData ()
Remarks
Cached time zone data includes data on the local time zone and the Coordinated Universal Time (UTC) zone.
You might call the ClearCachedData
method to reduce the memory devoted to the application's cache of time zone information or to reflect the fact that the local system's time zone has changed.
Storing references to the local and UTC time zones is not recommended. After the call to the ClearCachedData
method, these object variables will be undefined TimeZoneInfo objects that are no longer references to TimeZoneInfo.Local or TimeZoneInfo.Utc. For example, in the following code, the second call to the TimeZoneInfo.ConvertTime(DateTime, TimeZoneInfo, TimeZoneInfo) method throws an ArgumentException because the local
variable is no longer considered equal to TimeZoneInfo.Local.
TimeZoneInfo cst = TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time");
TimeZoneInfo local = TimeZoneInfo.Local;
Console.WriteLine(TimeZoneInfo.ConvertTime(DateTime.Now, local, cst));
TimeZoneInfo.ClearCachedData();
try
{
Console.WriteLine(TimeZoneInfo.ConvertTime(DateTime.Now, local, cst));
}
catch (ArgumentException e)
{
Console.WriteLine(e.GetType().Name + "\n " + e.Message);
}
open System
let cst = TimeZoneInfo.FindSystemTimeZoneById "Central Standard Time"
let local = TimeZoneInfo.Local
printfn $"{TimeZoneInfo.ConvertTime(DateTime.Now, local, cst)}"
TimeZoneInfo.ClearCachedData()
try
printfn $"{TimeZoneInfo.ConvertTime(DateTime.Now, local, cst)}"
with :? ArgumentException as e ->
printfn $"{e.GetType().Name}\n {e.Message}"
Dim cst As TimeZoneInfo = TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time")
Dim local As TimeZoneInfo = TimeZoneInfo.Local
Console.WriteLine(TimeZoneInfo.ConvertTime(Date.Now, local, cst))
TimeZoneInfo.ClearCachedData()
Try
Console.WriteLine(TimeZoneInfo.ConvertTime(Date.Now, local, cst))
Catch e As ArgumentException
Console.WriteLine(e.GetType().Name & vbCrLf & " " & e.Message)
End Try
Applies to
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