void Main()
{
	using (var session = Scheduler.Connect(".", LoginAuthenticationType.Windows, "", ""))
	{
		using (var context = session.NewDataContext())
		{

			//create a dictionary to track the variables we have seen and the location where we saw each
			var seenVariables = new Dictionary(StringComparer.OrdinalIgnoreCase);

			//add the server-level variables
			AddVariables(seenVariables, context.GetServerSettings().JobVariables, "Server");

			//fetch the root group
			var root = context.GetJobGroup(null);
			
			//go look for overrides
			CheckVariables(root, seenVariables);
		}
	}
}


//copy variables from a JobVariableCollection to the seenVariables dictionary
void AddVariables(Dictionary target, ArcanaDevelopment.adTempus.Client.Collections.JobVariableCollection source, string location)
{
	//we don't care about the value of the variable in this dictionary; we store the location where the variable was defined.
	foreach(var item in source)
	{
		target[item.Name] = location;
	}	
}


//check variables in a group (and children) for overrides
void CheckVariables(JobGroup group,Dictionary parentSeenVariables)
{
	var location = string.Format("Group \"{0}\"", group.FullyQualifiedName);

	//check for variables overridden at this level
	CheckVariables(group.JobVariables, parentSeenVariables, location);
	
	//make a copy of the seenVariables from the parent level(s) so we can add new variables from this level
	var seenVariables = parentSeenVariables.ToDictionary(entry => entry.Key,entry => entry.Value,StringComparer.OrdinalIgnoreCase);
	
	//add the variables from this level to the seenVariables collection
	AddVariables(seenVariables, group.JobVariables, location);

	//check all the jobs in this group
	var jobs=group.GetJobs(ObjectFetchOptions.FullFetch,false);
	foreach(var item in jobs)
	{
		CheckVariables(item,seenVariables);	
	}
	
	//check the child groups
	var childGroups=group.GetGroups(ObjectFetchOptions.FullFetch,false);
	foreach(var item in childGroups)
	{
		CheckVariables(item,seenVariables);
	}
}

//checks to see if a job or its steps override variables defined at a higher level
void CheckVariables(Job job,Dictionary parentSeenVariables)
{
	//make a copy of the seenVariables from the parent level(s)
	var seenVariables = parentSeenVariables.ToDictionary(entry => entry.Key, entry => entry.Value, StringComparer.OrdinalIgnoreCase);
	
	//add the variables from the job's Queue so we can see if the job has overridden any of those
	AddVariables(seenVariables, job.JobQueue.JobVariables, string.Format("Job Queue \"{0}\"",job.JobQueue.Name));
	
	var location=string.Format("Job \"{0}\"",job.FullyQualifiedName);
	
	//see if the job has overridden anything
	CheckVariables(job.JobVariables,seenVariables,location);


	//add the job's variables to the list so we can see if the steps override them
	AddVariables(seenVariables, job.JobVariables, location);

	//check the steps
	foreach(var item in job.Steps)
	{
		CheckVariables(item.JobVariables, seenVariables, string.Format("Job \"{0}\" step {1}", job.FullyQualifiedName,item.StepNumber));
	}
}

//checkes to see if any item in a JobVariableCollection overrides variables defined at a higher level
void CheckVariables(ArcanaDevelopment.adTempus.Client.Collections.JobVariableCollection variables, Dictionary seenVariables, string locationDescription)
{
	foreach (var item in variables)
	{
		string seenLocation;

		if (seenVariables.TryGetValue(item.Name, out seenLocation))
		{
			WriteOutput(string.Format("{0} overrides variable \"{1}\" from {2}", locationDescription, item.Name, seenLocation));
		}
		else
		{
			seenVariables.Add(item.Name, locationDescription);
		}
	}
}

void WriteOutput(string output)
{
	Debug.WriteLine(output);	
}