Add EnvironmentExtensions with RefreshEnvironmentVariables

PowerKit/Extensions/EnvironmentExtensions.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Collections;
+
+namespace PowerKit.Extensions;
+
+internal static class EnvironmentExtensions
+{
+    extension(Environment)
+    {
+        /// <summary>
+        /// Refreshes the environment variables of the current process by re-applying
+        /// the machine-level environment variables.
+        /// Only has an effect on Windows; on other platforms, this method is a no-op.
+        /// </summary>
+        public static void RefreshEnvironmentVariables()
+        {
+            if (!OperatingSystem.IsWindows())
+            {
+                return;
+            }
+
+            foreach (DictionaryEntry environmentVariable in Environment.GetEnvironmentVariables(EnvironmentVariableTarget.Machine))
+            {
+                var key = (string)environmentVariable.Key;
+                var value = (string?)environmentVariable.Value;
+
+                Environment.SetEnvironmentVariable(key, value, EnvironmentVariableTarget.Process);
+            }
+        }
+    }
+}