From 93fa32222ebb079ed694e075556ffdb993825080 Mon Sep 17 00:00:00 2001
From: Travis Plunk <travis.plunk@microsoft.com>
Date: Wed, 4 Jan 2023 09:57:02 -0800
Subject: [PATCH] Fix support for nanoserver due to lack of AMSI (#18882)

---
 .../security/SecuritySupport.cs                      | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/System.Management.Automation/security/SecuritySupport.cs b/src/System.Management.Automation/security/SecuritySupport.cs
index 7f9184e4aa..69f7324f01 100644
--- a/src/System.Management.Automation/security/SecuritySupport.cs
+++ b/src/System.Management.Automation/security/SecuritySupport.cs
@@ -1340,7 +1340,17 @@ namespace System.Management.Automation
         static AmsiUtils()
         {
 #if !UNIX
-            s_amsiInitFailed = !CheckAmsiInit();
+            try 
+            {
+                s_amsiInitFailed = !CheckAmsiInit();
+            }
+            catch (DllNotFoundException)
+            {
+                PSEtwLog.LogAmsiUtilStateEvent("DllNotFoundException", $"{s_amsiContext}-{s_amsiSession}");
+                s_amsiInitFailed = true;
+                return;
+            }
+            
             PSEtwLog.LogAmsiUtilStateEvent($"init-{s_amsiInitFailed}", $"{s_amsiContext}-{s_amsiSession}");
 #endif
         }