Methods on IGraphClient that have an Async suffix on their name work with the await keyword.

This means you can write code like this:

var node = await client.GetAsync<NamedNode>(625); Console.WriteLine(node.Data.Name);

That code will drop back to a kernel-level IO completion port while the underlying network request is in progress. (Albeit at some expense of managing such marshalling, so don't just use the async methods blindly.)