System.Text.RegularExpressions.RegexReplacement.Replacement C# (CSharp) Method

        internal string Replacement(Match match)
        {
            StringBuilder sb = StringBuilderCache.Acquire();

            ReplacementImpl(sb, match);

            return StringBuilderCache.GetStringAndRelease(sb);
        }

        /// <summary>
        /// Returns the expansion of the passed replacement pattern. For
        /// example, if the replacement pattern is ?$1$2?, Result returns the concatenation
        /// of Group(1).ToString() and Group(2).ToString().
        /// </summary>
        public virtual string Result(string replacement)
        {
            if (replacement == null)
            {
                throw new ArgumentNullException(nameof(replacement));
            }

            if (_regex == null)
            {
                throw new NotSupportedException(SR.NoResultOnFailed);
            }

            // Gets the weakly cached replacement helper or creates one if there isn't one already.
            RegexReplacement repl = RegexReplacement.GetOrCreate(_regex._replref, replacement, _regex.caps, _regex.capsize,
                                                                 _regex.capnames, _regex.roptions);

            return(repl.Replacement(this));
        }