/// <summary>
        /// Execute Activity
        /// </summary>
        /// <param name="context"></param>
        protected override void Execute(CodeActivityContext context)
        {
            var row        = Row.Get(context);
            var sourceText = string.Empty;

            if ((UTF8.Get(context) ? 1 : 0)
                + (Unicode.Get(context)? 1 : 0)
                + (Shift_JIS.Get(context) ? 1 : 0) != 1)
            {
                throw new ArgumentException("Invalid choice at Encoding");
            }

            Encoding enc;

            if (Shift_JIS.Get(context))
            {
                enc = Encoding.GetEncoding(932);
            }
            else if (Unicode.Get(context))
            {
                enc = Encoding.Unicode;
            }
            else
            {
                enc = Encoding.UTF8;
            }

            using (var reader = new System.IO.StreamReader(TemplateFile.Get(context), enc))
            {
                sourceText = reader.ReadToEnd();
            }

            foreach (DataColumn c in row.Table.Columns)
            {
                sourceText = sourceText.Replace("%%%_" + c.ColumnName + "_%%%", row[c].ToString());
            }

            if (CheckEscapeStringRemining.Get(context))
            {
                var r = new System.Text.RegularExpressions.Regex("^.*%%%_.*_%%%.*$");
                if (r.IsMatch(sourceText))
                {
                    throw new ApplicationException("Escape Characters is remining.");
                }
            }

            Result.Set(context, sourceText);
        }