System.Collections.EmptyReadOnlyDictionaryInternal.this C# (CSharp) Méthode

        public Object this[Object key] {
            get {
                if (key == null) {
                    throw new ArgumentNullException("key", Environment.GetResourceString("ArgumentNull_Key"));
                }
                return null;
            }
            set {
                if (key == null) {
                    throw new ArgumentNullException("key", Environment.GetResourceString("ArgumentNull_Key"));
                }

                if (!key.GetType().IsSerializable)                 
                    throw new ArgumentException(Environment.GetResourceString("Argument_NotSerializable"), "key");                    

                if( (value != null) && (!value.GetType().IsSerializable ) )
                    throw new ArgumentException(Environment.GetResourceString("Argument_NotSerializable"), "value");                    

                throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_ReadOnly"));
            }
        }