Need a way that is friendly with required etc. that can do "New Or Update Properties"

[JohnGalt1717]

Problem: Right now you end up repeating yourself a lot in scenarios like this:

var document = await efCore.Documents.FirstOrDefault(d => d.Id = documentId);
if (document is null) {
 {create new document and you must assign all required parameters.
}

{update document properties including all of the ones you just assigned if it's new and fields are required}

required as a keyword is great. But it adds even more to the verboseness of this syntax. And this happens all of the time when inserting/updating Dtos and many other cases.

I would like to see something similar to:

var document = await efCore.Documents.FirstOrDefault(d => d.Id = documentId);
document ?!= {
   {all fields to be updated or set}
}

This looks very similar to the way you update a record with new values.

What it would do behind the scenes is, if document was null, it would create a new one (in this case with the default constructor but (property1, property2) { ... fields} would also be valid) and assign all of the fields.

If the document existed, it would simply set the properties accordingly.

And of course the "all fields to be updated or set" would be strongly typed with the fields in the type.