iTextSharp.text.pdf.LongHashtable.this C# (CSharp) Метод

        public long this[long key]
        {
            get {
                LongHashtableEntry[] tab = table;
                int hash = key.GetHashCode();
                int index = ( hash & 0x7FFFFFFF ) % tab.Length;
                for ( LongHashtableEntry e = tab[index] ; e != null ; e = e.next ) {
                    if ( e.hash == hash && e.key == key )
                        return e.value;
                }
                return 0;
            }

            set {
                // Makes sure the key is not already in the hashtable.
                LongHashtableEntry[] tab = table;
                int hash = key.GetHashCode();
                int index = ( hash & 0x7FFFFFFF ) % tab.Length;
                for ( LongHashtableEntry e = tab[index] ; e != null ; e = e.next ) {
                    if ( e.hash == hash && e.key == key ) {
                        e.value = value;
                        return;
                    }
                }

                if ( count >= threshold ) {
                    // Rehash the table if the threshold is exceeded.
                    Rehash();
                    this[key] = value;
                    return;
                }

                // Creates the new entry.
                LongHashtableEntry en = new LongHashtableEntry();
                en.hash = hash;
                en.key = key;
                en.value = value;
                en.next = tab[index];
                tab[index] = en;
                ++count;
            }
        }