public static void ExecuteAppOnlyClientContextQuery <TContext>(ISPContext spContext, Func <TContext, Action> action)
where TContext : ClientContext
{
if (action == null)
{
throw new ArgumentNullException("action");
}
if (spContext != null)
{
TContext clientContext = (TContext)spContext.CreateAppOnlyClientContextForSPHost();
if (clientContext != null)
{
using (clientContext)
{
Action result = action.Invoke(clientContext);
clientContext.ExecuteQuery();
if (result != null)
{
result.Invoke();
}
}
}
}
}