CombinedSignersProvider

It is possible to combine multiple signature providers to complete all the signatures for a transaction

Eos eos = new Eos(new EosConfigurator()
{    
    HttpEndpoint = "https://nodes.eos42.io", //Mainnet
    ChainId = "aca376f206b8fc25a6ed44dbdc66547c36c6c33e3a119ffbeaef943642f0e906",
    ExpireSeconds = 60,
    SignProvider = new CombinedSignersProvider(new List<ISignProvider>() {
       new SuperSecretSignProvider(),
       new DefaultSignProvider("myprivatekey")
    }),
});