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System.TimeZoneNotFoundException F# snippet #7917

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Apr 5, 2022
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System.TimeZoneNotFoundException F# snippet #7917

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28 changes: 28 additions & 0 deletions snippets/fsharp/System/InvalidTimeZoneException/.ctor/TimeZoneNotFoundException.fs
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// <Snippet1>
open System

let retrieveTimeZone tzName =
try
TimeZoneInfo.FindSystemTimeZoneById tzName
with
| :? TimeZoneNotFoundException as ex1 ->
raise (TimeZoneNotFoundException($"The time zone '{tzName}' cannot be found.", ex1) )
| :? InvalidTimeZoneException as ex2 ->
raise (InvalidTimeZoneException($"The time zone {tzName} contains invalid data.", ex2) )

let handleInnerException () =
let timeZoneName = "Any Standard Time"
try
let tz = retrieveTimeZone timeZoneName
printfn $"The time zone display name is {tz.DisplayName}."
with :? TimeZoneNotFoundException as e ->
printfn $"{e.GetType().Name} thrown by application"
printfn $" Message: {e.Message}"
if e.InnerException <> null then
printfn " Inner Exception Information:"
let rec printInner (innerEx: exn) =
if innerEx <> null then
printfn $" {innerEx.GetType().Name}: {innerEx.Message}"
printInner innerEx.InnerException
printInner e
// </Snippet1>
10 changes: 10 additions & 0 deletions snippets/fsharp/System/InvalidTimeZoneException/.ctor/fs.fsproj
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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net6.0</TargetFramework>
</PropertyGroup>

<ItemGroup>
<Compile Include="TimeZoneNotFoundException.fs" />
</ItemGroup>
</Project>
1 change: 1 addition & 0 deletions xml/System/TimeZoneNotFoundException.xml
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Expand Up @@ -291,6 +291,7 @@
The following example tries to retrieve a nonexistent time zone, which throws a <xref:System.TimeZoneNotFoundException>. The exception handler wraps the exception in a new <xref:System.TimeZoneNotFoundException> object, which the exception handler returns to the caller. The caller's exception handler then displays information about both the outer and inner exception.

:::code language="csharp" source="~/snippets/csharp/System/InvalidTimeZoneException/.ctor/TimeZoneNotFoundException.cs" id="Snippet1":::
:::code language="fsharp" source="~/snippets/fsharp/System/InvalidTimeZoneException/.ctor/TimeZoneNotFoundException.fs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.TimeZoneNotFoundException.Class/vb/TimeZoneNotFoundException.vb" id="Snippet1":::

]]></format>
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