You should work on your Google skills. Searching for "c# evt file reader" provides lot of results including the CodeProject article Parsing event log(*.evt) file
]. Most will generate a list control based GUI output. But modifying that to create a textual file instead should be no problem.
If you did not find anything that matches your requirements, you can still write your own converter. Then have a look at the Windows Event Viewer Log (EVT) format
] which describes the EVT file format.