Add TempFile and TempDirectory utilities

PowerKit.Tests/TempDirectoryTests.cs

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+using System.IO;
+using FluentAssertions;
+using PowerKit;
+using Xunit;
+
+namespace PowerKit.Tests;
+
+public class TempDirectoryTests
+{
+    [Fact]
+    public void Create_Test()
+    {
+        // Act
+        using var tempDir = TempDirectory.Create();
+
+        // Assert
+        Directory.Exists(tempDir.Path).Should().BeTrue();
+    }
+
+    [Fact]
+    public void Dispose_Test()
+    {
+        // Arrange
+        using var tempDir = TempDirectory.Create();
+        File.WriteAllText(Path.Combine(tempDir.Path, "test.txt"), "test");
+
+        // Act
+        tempDir.Dispose();
+
+        // Assert
+        Directory.Exists(tempDir.Path).Should().BeFalse();
+    }
+
+    [Fact]
+    public void Dispose_AlreadyDeleted_Test()
+    {
+        // Arrange
+        using var tempDir = TempDirectory.Create();
+        Directory.Delete(tempDir.Path);
+
+        // Act & assert
+        var act = tempDir.Dispose;
+        act.Should().NotThrow();
+    }
+}

PowerKit.Tests/TempFileTests.cs

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+using System.IO;
+using FluentAssertions;
+using PowerKit;
+using Xunit;
+
+namespace PowerKit.Tests;
+
+public class TempFileTests
+{
+    [Fact]
+    public void Create_Test()
+    {
+        // Act
+        using var tempFile = TempFile.Create();
+
+        // Assert
+        File.Exists(tempFile.Path).Should().BeTrue();
+    }
+
+    [Fact]
+    public void Dispose_Test()
+    {
+        // Arrange
+        using var tempFile = TempFile.Create();
+
+        // Act
+        tempFile.Dispose();
+
+        // Assert
+        File.Exists(tempFile.Path).Should().BeFalse();
+    }
+
+    [Fact]
+    public void Dispose_AlreadyDeleted_Test()
+    {
+        // Arrange
+        using var tempFile = TempFile.Create();
+        File.Delete(tempFile.Path);
+
+        // Act & assert
+        var act = tempFile.Dispose;
+        act.Should().NotThrow();
+    }
+}

PowerKit/TempDirectory.cs

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+using System;
+using System.IO;
+
+namespace PowerKit;
+
+/// <summary>
+/// Represents a temporary directory that is automatically deleted when disposed.
+/// </summary>
+internal partial class TempDirectory(string path) : IDisposable
+{
+    /// <summary>
+    /// Gets the path of the temporary directory.
+    /// </summary>
+    public string Path { get; } = path;
+
+    /// <inheritdoc />
+    public void Dispose()
+    {
+        try
+        {
+            Directory.Delete(Path, true);
+        }
+        catch (DirectoryNotFoundException) { }
+    }
+}
+
+internal partial class TempDirectory
+{
+    /// <summary>
+    /// Creates a new temporary directory.
+    /// </summary>
+    public static TempDirectory Create()
+    {
+        var dirPath = System.IO.Path.Combine(
+            System.IO.Path.GetTempPath(),
+            Guid.NewGuid().ToString()
+        );
+
+        Directory.CreateDirectory(dirPath);
+
+        return new TempDirectory(dirPath);
+    }
+}

PowerKit/TempFile.cs

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+using System;
+using System.IO;
+
+namespace PowerKit;
+
+/// <summary>
+/// Represents a temporary file that is automatically deleted when disposed.
+/// </summary>
+internal partial class TempFile(string path) : IDisposable
+{
+    /// <summary>
+    /// Gets the path of the temporary file.
+    /// </summary>
+    public string Path { get; } = path;
+
+    /// <inheritdoc />
+    // File.Delete does not throw if the file does not exist
+    public void Dispose() => File.Delete(Path);
+}
+
+internal partial class TempFile
+{
+    /// <summary>
+    /// Creates a new temporary file.
+    /// </summary>
+    public static TempFile Create()
+    {
+        var filePath = System.IO.Path.Combine(System.IO.Path.GetTempPath(), Guid.NewGuid() + ".tmp");
+        File.Create(filePath).Dispose();
+
+        return new TempFile(filePath);
+    }
+}