Fix backcompat breaK

Author: HP712

buildpackLocal.bat

@@ -0,0 +1,3 @@
+dotnet clean Product.proj > clean.log
+dotnet build /r Product.proj
+dotnet pack --no-restore -o c:\localpackages --no-build Product.proj

src/Microsoft.IdentityModel.Tokens/EventBasedLRUCache.cs

@@ -81,6 +81,15 @@ internal class EventBasedLRUCache<TKey, TValue>
 
         internal ItemExpired OnItemExpired { get; set; }
 
+        /// <summary>
+        /// For back compat any friend would be broken, this is the same as OnItemExpired.
+        /// </summary>
+        internal ItemExpired OnItemRemoved
+        {
+            get { return OnItemExpired; }
+            set { OnItemExpired = value; }
+        }
+
         internal ItemCompacted OnItemMovedToCompactedList { get; set; }
 
         internal ItemRemoved OnItemRemovedFromCompactedList { get; set; }