From 683583cddb9f547beca9c30d17d7f32c058ead8b Mon Sep 17 00:00:00 2001
From: Vladimir Pecanac <vladimir.pecanac@gmail.com>
Date: Sun, 25 Oct 2026 13:28:45 +0100
Subject: [PATCH] WriteFileToTempFolder: move to .NET 10, add temp directory
 and DeleteOnClose examples

---
 .../TempFileCreatorTests.cs                   | 47 ++++++++++++++++++-
 .../WriteFileToTempFolder.Test.csproj         | 10 ++--
 .../WriteFileToTempFolder/Program.cs          | 34 ++++++++++++--
 .../WriteFileToTempFolder.csproj              |  2 +-
 4 files changed, 82 insertions(+), 11 deletions(-)

diff --git a/files-csharp/WriteFileToTempFolder/WriteFileToTempFolder.Test/TempFileCreatorTests.cs b/files-csharp/WriteFileToTempFolder/WriteFileToTempFolder.Test/TempFileCreatorTests.cs
index a40ec8777f..c36128381d 100644
--- a/files-csharp/WriteFileToTempFolder/WriteFileToTempFolder.Test/TempFileCreatorTests.cs
+++ b/files-csharp/WriteFileToTempFolder/WriteFileToTempFolder.Test/TempFileCreatorTests.cs
@@ -39,7 +39,7 @@ public void GivenSystemCreatedFileName_WhenSaving_TheContentIsAsExpected()
     public void GivenSystemSpecialFolderAndCustomName_WhenSaving_TheContentIsAsExpected()
     {
         //Arrange
-        var appDataPath = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
+        var appDataPath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
         var tempFile =  Path.Combine(appDataPath, "text.txt");
 
         //Act
@@ -51,4 +51,47 @@ public void GivenSystemSpecialFolderAndCustomName_WhenSaving_TheContentIsAsExpec
         //Assert
         Assert.Equal("Hello from CodeMaze!", tempFileContent);
     }
-}
\ No newline at end of file
+
+    [Fact]
+    public void GivenTempSubdirectory_WhenSaving_TheContentIsAsExpected()
+    {
+        //Arrange
+        var tempDirectory = Directory.CreateTempSubdirectory("codemaze-");
+        var tempFile = Path.Combine(tempDirectory.FullName, "text.txt");
+
+        //Act
+        TempFileCreator.CreateTempFile(tempFile);
+        var tempFileContent = File.ReadAllText(tempFile);
+
+        tempDirectory.Delete(recursive: true);
+
+        //Assert
+        Assert.Equal("Hello from CodeMaze!", tempFileContent);
+        Assert.False(Directory.Exists(tempDirectory.FullName));
+    }
+
+    [Fact]
+    public void GivenDeleteOnClose_WhenStreamIsDisposed_TheFileIsGone()
+    {
+        //Arrange
+        var tempFile = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
+        var options = new FileStreamOptions
+        {
+            Mode = FileMode.CreateNew,
+            Access = FileAccess.ReadWrite,
+            Options = FileOptions.DeleteOnClose
+        };
+
+        //Act
+        bool existedWhileOpen;
+        using (var stream = new FileStream(tempFile, options))
+        {
+            stream.Write("Hello from CodeMaze!"u8);
+            existedWhileOpen = File.Exists(tempFile);
+        }
+
+        //Assert
+        Assert.True(existedWhileOpen);
+        Assert.False(File.Exists(tempFile));
+    }
+}
diff --git a/files-csharp/WriteFileToTempFolder/WriteFileToTempFolder.Test/WriteFileToTempFolder.Test.csproj b/files-csharp/WriteFileToTempFolder/WriteFileToTempFolder.Test/WriteFileToTempFolder.Test.csproj
index dd96cb9534..20c8188be3 100644
--- a/files-csharp/WriteFileToTempFolder/WriteFileToTempFolder.Test/WriteFileToTempFolder.Test.csproj
+++ b/files-csharp/WriteFileToTempFolder/WriteFileToTempFolder.Test/WriteFileToTempFolder.Test.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
 
@@ -10,13 +10,13 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.0" />
-    <PackageReference Include="xunit" Version="2.4.2" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.11.0" />
+    <PackageReference Include="xunit" Version="2.9.3" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="4.0.1">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="coverlet.collector" Version="6.0.0">
+    <PackageReference Include="coverlet.collector" Version="10.1.0">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
diff --git a/files-csharp/WriteFileToTempFolder/WriteFileToTempFolder/Program.cs b/files-csharp/WriteFileToTempFolder/WriteFileToTempFolder/Program.cs
index 6ff6da3c76..7b7ab0757a 100644
--- a/files-csharp/WriteFileToTempFolder/WriteFileToTempFolder/Program.cs
+++ b/files-csharp/WriteFileToTempFolder/WriteFileToTempFolder/Program.cs
@@ -1,6 +1,6 @@
 using WriteFileToTempFolder;
 
-var tempFile = Path.Combine(Path.GetTempPath(),"text.txt");
+var tempFile = Path.Combine(Path.GetTempPath(), "text.txt");
 Console.WriteLine($"Creating temp file: '{tempFile}'");
 TempFileCreator.CreateTempFile(tempFile);
 
@@ -22,7 +22,7 @@
 
 Console.WriteLine();
 
-var appDataPath = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
+var appDataPath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
 tempFile = Path.Combine(appDataPath, "text.txt");
 Console.WriteLine($"Creating temp file: '{tempFile}'");
 TempFileCreator.CreateTempFile(tempFile);
@@ -30,4 +30,32 @@
 Console.WriteLine($"Reading temp file contents: '{tempFile}'");
 tempFileContent = File.ReadAllText(tempFile);
 Console.WriteLine(tempFileContent);
-File.Delete(tempFile);
\ No newline at end of file
+File.Delete(tempFile);
+
+Console.WriteLine();
+
+var tempDirectory = Directory.CreateTempSubdirectory("codemaze-");
+tempFile = Path.Combine(tempDirectory.FullName, "text.txt");
+Console.WriteLine($"Creating temp file: '{tempFile}'");
+TempFileCreator.CreateTempFile(tempFile);
+
+Console.WriteLine(File.ReadAllText(tempFile));
+tempDirectory.Delete(recursive: true);
+
+Console.WriteLine();
+
+tempFile = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
+var options = new FileStreamOptions
+{
+    Mode = FileMode.CreateNew,
+    Access = FileAccess.ReadWrite,
+    Options = FileOptions.DeleteOnClose
+};
+
+using (var stream = new FileStream(tempFile, options))
+{
+    stream.Write("Hello from CodeMaze!"u8);
+    Console.WriteLine($"Temp file '{tempFile}' exists? {File.Exists(tempFile)}");
+}
+
+Console.WriteLine($"Temp file '{tempFile}' exists? {File.Exists(tempFile)}");
diff --git a/files-csharp/WriteFileToTempFolder/WriteFileToTempFolder/WriteFileToTempFolder.csproj b/files-csharp/WriteFileToTempFolder/WriteFileToTempFolder/WriteFileToTempFolder.csproj
index 2150e3797b..ed9781c223 100644
--- a/files-csharp/WriteFileToTempFolder/WriteFileToTempFolder/WriteFileToTempFolder.csproj
+++ b/files-csharp/WriteFileToTempFolder/WriteFileToTempFolder/WriteFileToTempFolder.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>