Added new Collections. Does not compile

Author: ShawnLaMountain

src/ThunderDesign.Net-PCL.Threading/Collections/DictionaryThreadSafe.cs

@@ -1,6 +1,8 @@
 using System;
 using System.Collections.Generic;
-#if NETSTANDARD2_0 || NETSTANDARD2_1
+using System.ComponentModel;
+
+#if NETSTANDARD2_0_OR_GREATER || NET6_0_OR_GREATER
 using System.Runtime.Serialization;
 #endif
 using System.Threading;
@@ -189,8 +191,14 @@ public bool IsSynchronized
             }
         }
 
-#if NETSTANDARD2_0 || NETSTANDARD2_1
-        [System.Security.SecurityCritical]  // auto-generated_required
+#if NET8_0_OR_GREATER
+        [Obsolete("GetEnumerator is obsolete in .Net 8", false)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        public override void GetObjectData(SerializationInfo info, StreamingContext context)
+        {
+        }
+#elif NETSTANDARD2_0_OR_GREATER || NET6_0_OR_GREATER
+        [System.Security.SecurityCritical]
         public override void GetObjectData(SerializationInfo info, StreamingContext context)
         {
             _ReaderWriterLockSlim.EnterReadLock();
@@ -203,8 +211,10 @@ public override void GetObjectData(SerializationInfo info, StreamingContext cont
                 _ReaderWriterLockSlim.ExitReadLock();
             }
         }
+#endif
 
-        public override void OnDeserialization(Object sender)
+#if NETSTANDARD2_0_OR_GREATER || NET6_0_OR_GREATER
+        public override void OnDeserialization(object sender)
         {
             _ReaderWriterLockSlim.EnterReadLock();
             try
@@ -217,6 +227,74 @@ public override void OnDeserialization(Object sender)
             }
         }
 #endif
+
+#if NET6_0_OR_GREATER
+        public new bool TryAdd(TKey key, TValue value)
+        {
+            _ReaderWriterLockSlim.EnterWriteLock();
+            try
+            {
+                return base.TryAdd(key, value);
+            }
+            finally
+            {
+                _ReaderWriterLockSlim.ExitWriteLock();
+            }
+        }
+
+        public new bool Remove(TKey key, out TValue value)
+        {
+            _ReaderWriterLockSlim.EnterWriteLock();
+            try
+            {
+                return base.Remove(key, out value);
+            }
+            finally
+            {
+                _ReaderWriterLockSlim.ExitWriteLock();
+            }
+        }
+
+        public new int EnsureCapacity(int capacity)
+        {
+            _ReaderWriterLockSlim.EnterWriteLock();
+            try
+            {
+                return base.EnsureCapacity(capacity);
+            }
+            finally
+            {
+                _ReaderWriterLockSlim.ExitWriteLock();
+            }
+        }
+
+        public new void TrimExcess()
+        {
+            _ReaderWriterLockSlim.EnterWriteLock();
+            try
+            {
+                base.TrimExcess();
+            }
+            finally
+            {
+                _ReaderWriterLockSlim.ExitWriteLock();
+            }
+        }
+
+        public new void TrimExcess(int capacity)
+        {
+            _ReaderWriterLockSlim.EnterWriteLock();
+            try
+            {
+                base.TrimExcess(capacity);
+            }
+            finally
+            {
+                _ReaderWriterLockSlim.ExitWriteLock();
+            }
+        }
+#endif
+
         public new bool Remove(TKey key)
         {
             bool result = false;