How to efficiently check existence of a document in ravendb?

@domenico 

To efficiently check the existence of a document in RavenDB, you can use the session.Load method, which will return the document if it exists or null if it does not exist. This method is very efficient because it does not involve any network communication or disk access if the document is already in the session cache.

Here is an example in C#:

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using (var session = documentStore.OpenSession())
{
    string documentId = "orders/1";
    
    var order = session.Load<Order>(documentId);
    
    if (order != null)
    {
        // Document exists
        Console.WriteLine("Document exists");
    }
    else
    {
        // Document does not exist
        Console.WriteLine("Document does not exist");
    }
}

By using session.Load, you can quickly and efficiently check the existence of a document in RavenDB without incurring unnecessary network or disk overhead.