From 7eb134904a060eab8f5206d39f3817751b55a84b Mon Sep 17 00:00:00 2001
From: Ramon Smits <ramon.smits@gmail.com>
Date: Mon, 9 Oct 2023 17:55:45 +0200
Subject: [PATCH] Also add support for envvar expanding of config file settings
 in audit instance

---
 .../Infrastructure/Settings/ConfigFileSettingsReader.cs     | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/ServiceControl.Audit/Infrastructure/Settings/ConfigFileSettingsReader.cs b/src/ServiceControl.Audit/Infrastructure/Settings/ConfigFileSettingsReader.cs
index 8a87004149..3e4bf6ecc7 100644
--- a/src/ServiceControl.Audit/Infrastructure/Settings/ConfigFileSettingsReader.cs
+++ b/src/ServiceControl.Audit/Infrastructure/Settings/ConfigFileSettingsReader.cs
@@ -24,9 +24,11 @@ public static bool TryRead(string root, string name, out T value)
         {
             var fullKey = $"{root}/{name}";
 
-            if (ConfigurationManager.AppSettings[fullKey] != null)
+            var appSettingValue = ConfigurationManager.AppSettings[fullKey];
+            if (appSettingValue != null)
             {
-                value = (T)Convert.ChangeType(ConfigurationManager.AppSettings[fullKey], typeof(T));
+                appSettingValue = Environment.ExpandEnvironmentVariables(appSettingValue);
+                value = (T)Convert.ChangeType(appSettingValue, typeof(T));
                 return true;
             }