how convert structured text file to xml file api

I have a structured text file, each information is located by its position(offset) and length, for example, this line is taken from a text file:

H00VLS1    1200    32D1    20140602080524WIRE SPEC DATA 

and here is the rules to extract data:

HEADER_ID        length(3)  offset(1)
PRODUCT_NO       length(15) offset(4)
SORT_FIELD       length(9)  offset(19)
SUFFIX           length(9)  offset(28)
PERSON_CODE      length(5)  offset(33)
PROCESS_DATE     length(8)  offset(38)
MAINTENANCE_DATE length(8)  offset(46)

finally, after applying this rules we get this data:

HEADER_ID   PRODUCT_NO   SORT_FIELD   SUFFIX     PERSON_CODE   PROCESS_DATE   MAINTENANCE_DATE
H00         VLS1  1200   32D1         20140      60208         0607WIRE       SPEC DA

generated xml file:

<header>
<header_id>H00</header_id>
<product_no>VLS1  1200</product_no>
<sort_feild>32D1</sort_feild>
<suffix>20140</suffix>
<person_code>60208</person_code>
<process_date>0607WIRE</process_date>
<maintenance_date>SPEC DA</maintenance_date>
</header>

Now my question is there a C# class or api to convert my text file to an xml or json file, based on length and offset rules ?