it looks correct, but you don’t need to invoke the delegate yourself, the WriteTransaction seems to do that for you. so directly connect the delegate to it’s input.
the easiest way is to start a link at the input for the delegate and then press middle click to create the delegate.
There are different overlaods of the WriteTransaction method: https://neo4j.com/docs/api/dotnet-driver/current/html/59a1b235-df88-74f2-bc9f-517c2df405d8.htm
you might need to chose another one that has the delegate input. in order to do that, double click the write WriteTransaction node and add the delegate input pin to the selection.