You don't need the overhead of a SPV client if all you need is to push a tx to the network. You can do it with much less. Feel free to check out my project Bitcoin.Net and its MinimalClient. There is a UI for it too which you can follow here:
https://github.com/Autarkysoft/Denovo/blob/master/Src/Denovo/ViewModels/PushTxViewModel.cs

I wouldn't recommend using it for wallet generation at the moment since I've been changing the ECC implementation and it might not be the safest option.