JsonFx.BuildTools.HtmlDistiller.HtmlDistiller.DecodeHtmlEntities C# (CSharp) Method

        public static string DecodeHtmlEntities(string source)
        {
            StringBuilder builder = null;
            int start = 0;

            for (int i=start; i<source.Length; i++)
            {
                if (source[i] == '&')
                {
                    char entity;
                    int count = DecodeHtmlEntity(source, i, out entity);
                    if (count > 1)
                    {
                        if (builder == null)
                        {
                            // initialize StringBuilder
                            builder = new StringBuilder(source.Length);
                        }
                        builder.Append(source, start, i-start);
                        builder.Append(entity);
                        i += count-1;
                        start = i+1;
                    }
                }
            }

            if (builder == null)
            {
                // no entities were found
                return source;
            }

            // write out rest of string
            builder.Append(source, start, source.Length-start);
            return builder.ToString();
        }