InterceptingProvider's Execute Implementation

InterceptingProvider.Execute.cs

public IEnumerator<T> ExecuteQuery(Expression expression)
{
	//intercept expression
	var interceptedExpression = InterceptExpression(expression);

	//execute query using underlying provider
	var enumerator = _underlyingProvider.CreateQuery<T>(interceptedExpression).GetEnumerator();

	//is post processing hook specified?
	if (this.AfterQueryExecutedHandler != null)
	{
		var queryResults = new List<T>();
		while (enumerator.MoveNext())
			queryResults.Add(enumerator.Current);

		//call the handler with the query results
		this.AfterQueryExecutedHandler(interceptedExpression, queryResults);

		//return list so that WCF Data Services can proceed
		return queryResults.GetEnumerator();
	}
	return enumerator;
}