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May 9, 2022
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System.UnauthorizedAccessException F# snippet #8053

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10 changes: 10 additions & 0 deletions snippets/fsharp/System/UnauthorizedAccessException/Overview/fs.fsproj
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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net6.0</TargetFramework>
</PropertyGroup>

<ItemGroup>
<Compile Include="withio.fs" />
</ItemGroup>
</Project>
23 changes: 23 additions & 0 deletions snippets/fsharp/System/UnauthorizedAccessException/Overview/withio.fs
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// <Snippet1>
open System
open System.IO


let filePath = @".\ROFile.txt"
if File.Exists filePath |> not then
File.Create filePath |> ignore
// Keep existing attributes, and set ReadOnly attribute.
File.SetAttributes(filePath, (FileInfo filePath).Attributes ||| FileAttributes.ReadOnly)

do
use sw = new StreamWriter(filePath)
try
sw.Write "Test"
with :? UnauthorizedAccessException ->
let attr = (FileInfo filePath).Attributes
printf "UnAuthorizedAccessException: Unable to access file. "
if int (attr &&& FileAttributes.ReadOnly) > 0 then
printf "The file is read-only."
// The example displays the following output:
// UnAuthorizedAccessException: Unable to access file. The file is read-only.
// </Snippet1>
1 change: 1 addition & 0 deletions xml/System/UnauthorizedAccessException.xml
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Expand Up @@ -73,6 +73,7 @@
The following example illustrates the <xref:System.UnauthorizedAccessException> exception that is thrown when attempting to write to a read-only file.

:::code language="csharp" source="~/snippets/csharp/System/UnauthorizedAccessException/Overview/withio.cs" id="Snippet1":::
:::code language="fsharp" source="~/snippets/fsharp/System/UnauthorizedAccessException/Overview/withio.fs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.unauthorizedaccessexception/vb/withio.vb" id="Snippet1":::

]]></format>
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