From ce95c98fbbf7592b1b74127a4b87fcd607a25c1a Mon Sep 17 00:00:00 2001
From: Trivalik <mister_rs@web.de>
Date: Tue, 15 Jun 2021 21:31:51 +0200
Subject: [PATCH] catch DirectoryOperationException to check Negotiate as for
 LdapException (#52748)

resolves https://github.com/dotnet/runtime/issues/51222

Co-authored-by: Trivalik <rborchert@live.de>
---
 .../src/System/DirectoryServices/AccountManagement/Context.cs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/libraries/System.DirectoryServices.AccountManagement/src/System/DirectoryServices/AccountManagement/Context.cs b/src/libraries/System.DirectoryServices.AccountManagement/src/System/DirectoryServices/AccountManagement/Context.cs
index ce5e870eea2..1947b66f588 100644
--- a/src/libraries/System.DirectoryServices.AccountManagement/src/System/DirectoryServices/AccountManagement/Context.cs
+++ b/src/libraries/System.DirectoryServices.AccountManagement/src/System/DirectoryServices/AccountManagement/Context.cs
@@ -264,6 +264,10 @@ public bool Validate(string userName, string password)
                             // we don't return false here even if we failed with ERROR_LOGON_FAILURE. We must check Negotiate
                             // because there might be cases in which SSL fails and Negotiate succeeds
                         }
+                        catch (DirectoryOperationException)
+                        {
+                            // see LdapException
+                        }
 
                         BindLdap(networkCredential, defaultContextOptionsNegotiate);
                         _lastBindMethod = AuthMethod.Negotiate;
-- 
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