The property gets or sets a HeaderFooterFormat enumeration value that indicates whether headers and footers will be interpreted as text or as HTML.
Assembly: Microsoft.Exchange.Data.Common (in Microsoft.Exchange.Data.Common.dll)
Property valueType: Microsoft.Exchange.Data.TextConverters.HeaderFooterFormat
If the property is set to Html, then Header and Footer are interpreted as HTML and only the text that would be visible in the HTML fragment after it was rendered will be inserted into the output. Otherwise, if the property is set to Text, then Header and Footer are interpreted as raw plain text that will be properly escaped and inserted directly into the output.