ViewHistory - C#

// DocumentNOW V2 ViewHistory example

// force TLS 1.2 if .net < 4.6
ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12;

Guid accountContextID = new Guid(<fromYourAccount>);
Guid documentID = new Guid(<savedFromYourSubmission>);
Guid authToken = new Guid(<savedFromYourSubmission>);

// assuming we set the namespace on the service proxy to DocNow ...
DocNow.ViewHistoryServiceClient client = new DocNow.ViewHistoryServiceClient();
DocNow.DocumentHistoryView request = new DocNow.DocumentHistoryView();

request.Id = documentID;            
request.AuthToken = authToken;
request.ContextIdentifier = accountContextID;
DocNow.DocumentHistoryViewResult[] historyresults = client.ViewHistory(new DocNow.DocumentHistoryView[] { request });

if (historyresults.Length > 0)
{
    if (historyresults[0].Exceptions != null)
    {
        StringBuilder sb = new StringBuilder();
        foreach (DocNow.HistoryViewException exception in historyresults[0].Exceptions)
        {
            sb.AppendFormat("{0} : {1}{2}", exception.Severity.ToString(), exception.Value, Environment.NewLine);
        }
        Console.WriteLine(sb.ToString());
    }
    else
    {
        foreach(DocNow.DocumentEvent docevent in historyresults[0].Events)
        {
            Console.WriteLine($"{docevent.Date.ToString()} : {docevent.Details}");
        }
    }
}