From fc6211cacaf756d01f383c92c703124485a3acaa Mon Sep 17 00:00:00 2001
From: Jan Kotas <jkotas@microsoft.com>
Date: Fri, 9 Dec 2016 22:17:28 -0800
Subject: [PATCH] Regression test for
 https://github.com/dotnet/coreclr/pull/8580

---
 .../ConditionalWeakTableTests.cs              | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/src/System.Runtime/tests/System/Runtime/CompilerServices/ConditionalWeakTableTests.cs b/src/System.Runtime/tests/System/Runtime/CompilerServices/ConditionalWeakTableTests.cs
index 1f0f955571a3..7a64f1e39080 100644
--- a/src/System.Runtime/tests/System/Runtime/CompilerServices/ConditionalWeakTableTests.cs
+++ b/src/System.Runtime/tests/System/Runtime/CompilerServices/ConditionalWeakTableTests.cs
@@ -183,6 +183,28 @@ public static void Concurrent_GetValue_Read_Remove_SameObject()
             });
         }
 
+        [Fact]
+        public static void AddRemove_DropValue()
+        {
+            var key = new object();
+            var value = new object();
+
+            var cwt = new ConditionalWeakTable<object, object>();
+
+            cwt.Add(key, value);
+            cwt.Remove(key);
+
+            // Verify that the removed entry is not keeping the value alive
+            var wrValue = new WeakReference(value);
+            value = null;
+
+            GC.Collect();
+            Assert.False(wrValue.IsAlive);
+
+            GC.KeepAlive(cwt);
+            GC.KeepAlive(key);
+        }
+
         [Fact]
         public static void GetOrCreateValue()
         {