System.Collections.Hashtable.Synchronized C# (CSharp) Method

        public static Hashtable Synchronized(Hashtable table)
        {
            if (table == null)
                throw new ArgumentNullException(nameof(table));
            Contract.EndContractBlock();
            return new SyncHashtable(table);
        }

 public override object Clone()
 {
     lock (this._table.SyncRoot) {
         return(Hashtable.Synchronized((Hashtable)this._table.Clone()));
     }
 }