public IEulerPluginContext PerformAction(IEulerPluginContext context)
 {
     List<string> Characters = new List<string>();
     Characters.AddRange(_characters.Split(','));
     context.strResultLongText = Permutations(Characters, _limit);
     return context;
 }

        private async void PerformActionAsync(IEulerPlugin plugin,  IEulerPluginContext context) {

            Task<IEulerPluginContext> tContext = plugin.PerformActionAsync(context);
            context = await tContext;
            textBox1.AppendText(string.Format("{0}{1}", plugin.Name, Environment.NewLine));
            textBox1.AppendText(String.Format("  {0}{1}", context.strResultLongText, System.Environment.NewLine));
            textBox1.AppendText(string.Format("  Results Calculated in: {0} ms{1}", context.spnDuration.TotalMilliseconds, Environment.NewLine));
        }

 public Task<IEulerPluginContext> PerformActionAsync(IEulerPluginContext context)
 {
     return Task.Factory.StartNew(() =>
     {
         // need a more elegant solution.
         DateTime dtStart, dtEnd;
         dtStart = DateTime.Now;
         Task<String> s = BruteForceAsync();
         dtEnd = DateTime.Now;
         context.strResultLongText = s.Result;
         context.spnDuration = dtEnd.Subtract(dtStart);
         return context;
     });
 }

 public IEulerPluginContext PerformAction(IEulerPluginContext context)
 {
     context.strResultLongText = GetLargestProductInSeries(_limit, _numericSeries);
     return context;
 }

        public void PerformGetInput(IEulerPluginContext context)
        {
            _limit = GetLimit();
            _numericSeries = GetSeries();

        }

 public IEulerPluginContext PerformAction(IEulerPluginContext context) {
     context.strResultLongText = SumOfEventFibonacci(_limit);
     return context;
 }

 public IEulerPluginContext PerformAction(IEulerPluginContext context)
 {
     context.strResultLongText = GetLargestPalindromicProduct(_limit);
     return context;
 }

 public void PerformGetInput(IEulerPluginContext context)
 {
     _limit = GetLimit();
 }

 public IEulerPluginContext PerformAction(IEulerPluginContext context)
 {
     context.strResultLongText = GetSumOfFirstNPrimes(_limit);
     return context;
 }

 public IEulerPluginContext PerformAction(IEulerPluginContext context) {
     context.strResultLongText = GetLargestPrimeFactor(_limit);
     return context;
 }

 public IEulerPluginContext PerformAction(IEulerPluginContext context)
 {
     context.strResultLongText = CalculateTriangularNumbers(_limit);
     return context;
 }

 // The single point of entry to our plugin.
 // Accepts an IEulerPluginContext object.
 public IEulerPluginContext PerformAction( IEulerPluginContext context)
 {
     context.strResultLongText = AlternateSum(_limit);
     return context;
 }