Contains any textual content included with the content part. If the ContentType property is set to one of the following:
MIME Type
Description
text/plain
Plain text
text/html
HTML
text/xml
XML
application/xml
XML
application/json
JSON
application/javascript
JavaScript
application/pdf
PDF document
then the part content will be available in this property. If the ContentType property contains any other value, then the part content will need to be accessed using the ContentStream property.
If the character set is set as part of the ContentType property using the charset attribute, then it must be set to "utf-8". If the character set is set to a different value, then the part content will need to be accessed using the ContentStream property.