PrintToPDFOptions - PageSize: Object width and height = Invalid Page Size error

[wana211]

The "PrintToPDFOptions" class which is passed to the "PrintToPDFAsync" method has a "PageSize" property.
In Electron you can pass in an object specifying a custom width and height.
However in Electron.NET this property must be a string.
When Electron.NET is deserializing the "PrintToPDFOptions" the "PageSize" property is being deserialized as a string and sent to Electron as a string rather than a JSON object. This results in Electron expecting the page size to be one of the pre-defined string ones (e.g. A4) rather than a custom size.