Add Process.IsRunning(int processId) static extension method

PowerKit.Tests/ProcessExtensionsTests.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Diagnostics;
+using FluentAssertions;
+using PowerKit.Extensions;
+using Xunit;
+
+namespace PowerKit.Tests;
+
+public class ProcessExtensionsTests
+{
+    [Fact]
+    public void IsRunning_Running_Test()
+    {
+        // Act & assert
+        Process.IsRunning(Environment.ProcessId).Should().BeTrue();
+    }
+
+    [Fact]
+    public void IsRunning_NotRunning_Test()
+    {
+        // Arrange
+        using var process = Process.Start(new ProcessStartInfo("dotnet", "--version")
+        {
+            RedirectStandardOutput = true
+        })!;
+
+        process.WaitForExit();
+        var processId = process.Id;
+
+        // Act & assert
+        Process.IsRunning(processId).Should().BeFalse();
+    }
+}

PowerKit/Extensions/ProcessExtensions.cs

@@ -0,0 +1,25 @@
+using System.Diagnostics;
+
+namespace PowerKit.Extensions;
+
+internal static class ProcessExtensions
+{
+    extension(Process)
+    {
+        /// <summary>
+        /// Checks whether the process identified by the specified ID is currently running.
+        /// </summary>
+        public static bool IsRunning(int processId)
+        {
+            try
+            {
+                using var process = Process.GetProcessById(processId);
+                return !process.HasExited;
+            }
+            catch
+            {
+                return false;
+            }
+        }
+    }
+}