public abstract Task<TResult> RunCommandAsync<TResult>(
	Command<TResult> command,
	ReadPreference readPreference = null,
	CancellationToken cancellationToken = null
)

Public MustOverride Function RunCommandAsync(Of TResult) ( 
	command As Command(Of TResult),
	Optional readPreference As ReadPreference = Nothing,
	Optional cancellationToken As CancellationToken = Nothing
) As Task(Of TResult)

abstract RunCommandAsync : 
        command : Command<'TResult> * 
        ?readPreference : ReadPreference * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _readPreference = defaultArg readPreference null
        let _cancellationToken = defaultArg cancellationToken null
*)
-> Task<'TResult>