PM> install-package OxyPlot.Wpf

<Window x:Class="OxyPlotWpfTests.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:oxy="http://oxyplot.org/wpf"
        xmlns:oxyPlotWpfTests="clr-namespace:OxyPlotWpfTests"
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <oxyPlotWpfTests:MainWindowViewModel x:Key="MainWindowViewModel" />
    </Window.Resources>
    <Grid DataContext="{Binding Source={StaticResource MainWindowViewModel}}">
        <oxy:PlotView Model="{Binding PlotModel}"/>
    </Grid>
</Window>

public class MainWindowViewModel
{
   public PlotModel PlotModel { get; set; } 

        private void createPlotModel()
        {
            PlotModel = new PlotModel
            {
                Title = "سری خطوط",
                Subtitle = "Pan (right click and drag)/Zoom (Middle click and drag)/Reset (double-click)"
            };
            PlotModel.MouseDown += (sender, args) =>
            {
                if (args.ChangedButton == OxyMouseButton.Left && args.ClickCount == 2)
                {
                    foreach (var axis in PlotModel.Axes)
                        axis.Reset();

                    PlotModel.InvalidatePlot(false);
                }
            };
        }

       readonly LinearAxis _xAxis = new LinearAxis();
        private void addXAxis()
        {
            _xAxis.Minimum = 0;
            _xAxis.MaximumPadding = 1;
            _xAxis.MinimumPadding = 1;
            _xAxis.Position = AxisPosition.Bottom;
            _xAxis.Title = "X axis";
            _xAxis.MajorGridlineStyle = LineStyle.Solid;
            _xAxis.MinorGridlineStyle = LineStyle.Dot;
            PlotModel.Axes.Add(_xAxis);
        }

        readonly LinearAxis _yAxis = new LinearAxis();
        private void addYAxis()
        {
            _yAxis.Minimum = 0;
            _yAxis.Title = "Y axis";
            _yAxis.MaximumPadding = 1;
            _yAxis.MinimumPadding = 1;
            _yAxis.MajorGridlineStyle = LineStyle.Solid;
            _yAxis.MinorGridlineStyle = LineStyle.Dot;
            PlotModel.Axes.Add(_yAxis);
        }

        readonly LineSeries _lineSeries1 = new LineSeries();
        private void addLineSeries1()
        {
            _lineSeries1.MarkerType = MarkerType.Circle;
            _lineSeries1.StrokeThickness = 2;
            _lineSeries1.MarkerSize = 3;
            _lineSeries1.Title = "Start";
            _lineSeries1.MouseDown += (s, e) =>
            {
                if (e.ChangedButton == OxyMouseButton.Left)
                {
                    PlotModel.Subtitle = "Index of nearest point in LineSeries: " + Math.Round(e.HitTestResult.Index);
                    PlotModel.InvalidatePlot(false);
                }
            };
            PlotModel.Series.Add(_lineSeries1);
        }

        readonly LineSeries _lineSeries2 = new LineSeries();
        private void addLineSeries2()
        {
            _lineSeries2.MarkerType = MarkerType.Circle;
            _lineSeries2.Title = "End";
            _lineSeries2.StrokeThickness = 2;
            _lineSeries2.MarkerSize = 3;
            _lineSeries2.MouseDown += (s, e) =>
            {
                if (e.ChangedButton == OxyMouseButton.Left)
                {
                    PlotModel.Subtitle = "Index of nearest point in LineSeries: " + Math.Round(e.HitTestResult.Index);
                    PlotModel.InvalidatePlot(false);
                }
            };
            PlotModel.Series.Add(_lineSeries2);
        }

        private int _xMax;
        private int _yMax;
        private bool _haveNewPoints;
        private void addPoints()
        {
            var timer = new DispatcherTimer {Interval = TimeSpan.FromSeconds(1)};
            var rnd = new Random();
            var x = 1;
            updateXMax(x);
            timer.Tick += (sender, args) =>
            {
                var y1 = rnd.Next(100);
                updateYMax(y1);
                _lineSeries1.Points.Add(new DataPoint(x, y1));

                var y2 = rnd.Next(100);
                updateYMax(y2);
                _lineSeries2.Points.Add(new DataPoint(x, rnd.Next(y2)));

                x++;

                updateXMax(x);
                _haveNewPoints = true;
            };
            timer.Start();
        }

        private void updateXMax(int value)
        {
            if (value > _xMax)
            {
                _xMax = value;
            }
        }

        private void updateYMax(int value)
        {
            if (value > _yMax)
            {
                _yMax = value;
            }
        }

        private readonly Stopwatch _stopwatch = new Stopwatch();
        private void updatePlot()
        {
            CompositionTarget.Rendering += (sender, args) =>
            {
                if (_stopwatch.ElapsedMilliseconds > _lastUpdateMilliseconds + 2000 && _haveNewPoints)
                {
                    if (_yMax > 0 && _xMax > 0)
                    {
                        _yAxis.Maximum = _yMax + 3;
                        _xAxis.Maximum = _xMax + 1;
                    }

                    PlotModel.InvalidatePlot(false);

                    _haveNewPoints = false;
                    _lastUpdateMilliseconds = _stopwatch.ElapsedMilliseconds;
                }
            };
        }

using System.Threading.Tasks;

namespace Async05
{
    class Program
    {
        static void Main(string[] args)
        {
            var res = doSomethingAsync().Result;
        }

        static async Task<int> doSomethingAsync()
        {
            await Task.Delay(1);
            return 1;
        }
    }
}

using System;
using System.Collections.Generic;
using System.Net;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace Async05
{
    class Program
    {
        static void Main(string[] args)
        {
            var task = showTitlesAsync(new[]
            {
                "http://www.google.com",
                "https://www.dntips.ir"
            });
            task.Wait();

            Console.WriteLine();
            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();
        }

        static async Task showTitlesAsync(IEnumerable<string> urls)
        {
            foreach (var url in urls)
            {
                var title = await getTitleAsync(url);
                Console.WriteLine(title);
            }
        }

        static async Task<string> getTitleAsync(string url)
        {
            var data = await new WebClient().DownloadStringTaskAsync(url);
            return getTitle(data);
        }

        private static string getTitle(string data)
        {
            const string patternTitle = @"(?s)<title>(.+?)</title>";
            var regex = new Regex(patternTitle);
            var mc = regex.Match(data);
            return mc.Groups.Count == 2 ? mc.Groups[1].Value.Trim() : string.Empty;
        }
    }
}

        static async Task showTitlesAsync(IEnumerable<string> urls)
        {
            foreach (var url in urls)
            {
                try
                {
                    var title = await getTitleAsync(url);
                    Console.WriteLine(title);
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex);
                }
            }
        }

 System.Net.WebException: The remote server returned an error: (502) Bad Gateway.
System.Net.WebException: The remote server returned an error: (502) Bad Gateway.

Press any key to exit...

public async Task<double> GetSum2Async()
        {
            try
            {
                var task1 = GetNumberAsync();
                var task2 = GetNumberAsync();

                var compositeTask = Task.WhenAll(task1, task2);
                await compositeTask.ContinueWith(x => { });

                return compositeTask.Result[0] + compositeTask.Result[1];
            }
            catch (Exception ex)
            {
                //todo: log ex
                throw;
            }
        }

        public async Task<double> GetSumAsync()
        {
            var leftOperand = await GetNumberAsync();
            var rightOperand = await GetNumberAsync();

            return leftOperand + rightOperand;
        }

using System;
using System.Threading.Tasks;

namespace Async01
{
    class Program
    {
        static void Main(string[] args)
        {
            Test2();
            Test();
            Console.ReadLine();

            GC.Collect();
            GC.WaitForPendingFinalizers();

            Console.ReadLine();
        }

        public static async Task Test()
        {
            throw new Exception();
        }

        public static async void Test2()
        {
            throw new Exception();
        }
    }
}

 Warning  1  Because this call is not awaited, execution of the current method continues before the call is completed.
Consider applying the 'await' operator to the result of the call.

using System;
using System.Threading.Tasks;

namespace Async01
{
    class Program
    {
        static void Main(string[] args)
        {
            TaskScheduler.UnobservedTaskException += TaskScheduler_UnobservedTaskException;

            //Test2();
            Test();
            Console.ReadLine();

            GC.Collect();
            GC.WaitForPendingFinalizers();

            Console.ReadLine();
        }

        private static void TaskScheduler_UnobservedTaskException(object sender, UnobservedTaskExceptionEventArgs e)
        {
            e.SetObserved();
            Console.WriteLine(e.Exception);
        }

        public static async Task Test()
        {
            throw new Exception();
        }

        public static async void Test2()
        {
            throw new Exception();
        }
    }
}

Task.Factory.StartNew(() => { throw new Exception(); });

Thread.Sleep(100);
GC.Collect();
GC.WaitForPendingFinalizers();

 <configuration>
    <runtime>
      <ThrowUnobservedTaskExceptions enabled="true"/>
    </runtime>
</configuration>

protected override void LoadState(Object navigationParameter, Dictionary<String, Object> pageState)
{
    try
    {
        ClickMeButton.Tapped += async (sender, args) =>
        {
             throw new Exception();        

        };
    }
    catch (Exception ex)
    {
        // This won’t catch exceptions!
        TextBlock1.Text = ex.Message;
    }
}

 public delegate void TappedEventHandler(object sender, TappedRoutedEventArgs e);

Parler relied on several external services for security; but when those services were yanked away (due to Parler hosting neo-nazi and insurrectionist content), their code took the absence of such services as a reason to approve whatever action the user was trying to take. It’s the equivalent of your house security system letting everyone in if the phone-line goes down. There’s so much more to the Parler hack, from the lack of rate-limiting to the ability for people to pull down 60-70TBs of information from Parler’s AWS hosted storage, which — to add insult to injury, results in a massive egress bill from AWS to Parler, on top of AWS no longer hosting Parler. 

dnSpy is a debugger and .NET assembly editor. You can use it to edit and debug assemblies even if you don't have any source code available.

Some Features 

• Debug .NET Framework, .NET Core and Unity game assemblies, no source code required
• Set breakpoints and step into any assembly
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• IL editor for low level IL method body editing 

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Microsoft Build 2020 session catalog is now live, check out over 600 sessions
Over 600 sessions will happen during Microsoft Build 2020, and you can look through a catalog of all of them now. 

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