Initial

App.config

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+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
+    </startup>
+</configuration>

App.xaml

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+<Application x:Class="TaskManager.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="clr-namespace:TaskManager"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+
+    </Application.Resources>
+</Application>

App.xaml.cs

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+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using System.Data;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace TaskManager
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+    }
+}

MainWindow.xaml

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+<Window x:Class="TaskManager.MainWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:local="clr-namespace:TaskManager"
+        mc:Ignorable="d"
+        Title="Task Manager" Height="450" Width="500">
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="20"/>
+            <RowDefinition/>
+        </Grid.RowDefinitions>
+
+        <TextBox Grid.Row="0" Height="20" Name="Search" FontSize="14" BorderBrush="White" TextChanged="Search_KeyDown"/>
+        <ListView Margin="10" Name="ProcessInfo"  Grid.Row="1">
+            <ListView.View>
+                <GridView>
+                    <GridViewColumn Header="PROCESS NAME" Width="120" DisplayMemberBinding="{Binding name}"/>
+                    <GridViewColumn Header="ID" Width="50" DisplayMemberBinding="{Binding id}" />
+                </GridView>
+            </ListView.View>
+
+            <ListView.ContextMenu>
+                <ContextMenu>
+                    <MenuItem Header="Delete" Click="Delete_Click"/>
+                </ContextMenu>
+            </ListView.ContextMenu>
+        </ListView>
+    </Grid>
+</Window>

MainWindow.xaml.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+using System.Diagnostics;
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+using System.Text.RegularExpressions;
+
+namespace TaskManager
+{
+    /// <summary>
+    /// Interaction logic for MainWindow.xaml
+    /// </summary>
+    public partial class MainWindow : Window, INotifyPropertyChanged
+    {
+        private Process[] processes = Process.GetProcesses();
+        private List<Processlist> processlist = new List<Processlist>();
+        private List<Processlist> foundList = new List<Processlist>();
+        public MainWindow()
+        {
+            InitializeComponent();
+            processes = Process.GetProcesses();
+            ProcessInfo.Foreground = new SolidColorBrush(Colors.Black);
+            foreach (Process item in processes)
+            {
+                processlist.Add(new Processlist() { id = item.Id, name = item.ProcessName });
+            }
+            ProcessInfo.ItemsSource = processlist;
+        }
+
+
+        //TODO
+        private void LoadProcesses()
+        {
+
+        }
+
+
+
+        private void Delete_Click(object sender, RoutedEventArgs e)
+        {
+            var pid = (ProcessInfo.SelectedItem as Processlist).id;
+            var process = Process.GetProcessById(pid);
+            processlist.RemoveAt(ProcessInfo.SelectedIndex);
+            ICollectionView view = CollectionViewSource.GetDefaultView(ProcessInfo.ItemsSource);
+            view.Refresh();
+            process.Kill();
+        }
+
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        public void OnPropertyChanged([CallerMemberName] string property = "")
+        {
+            PropertyChanged(this, new PropertyChangedEventArgs(property));
+        }
+
+
+        //TODO
+        private void Search_KeyDown(object sender, KeyEventArgs e)
+        {
+            for (int i = 0; i < processlist.Count; i++)
+            {
+                if (e.Key == Key.Enter)
+                {
+                    if (Search.Text.Contains(processlist[i].name))
+                    {
+                        foundList.Add(processlist[i]);
+                    }
+
+                    else if (Search.Text.Contains(processlist[i].id.ToString()))
+                    {
+                        foundList.Add(processlist[i]);
+                    }
+
+                    else
+                    {
+
+                    }
+                }
+            }
+            ProcessInfo.ItemsSource = foundList;
+            ICollectionView view = CollectionViewSource.GetDefaultView(ProcessInfo.ItemsSource);
+            view.Refresh();
+
+            if(Search.Text == string.Empty)
+            {
+                LoadProcesses();
+
+                view = CollectionViewSource.GetDefaultView(ProcessInfo.ItemsSource);
+                view.Refresh();
+            }
+        }
+    }
+
+    public class Processlist
+    {
+        public int id { get; set; }
+        public string name { get; set; }
+    }
+}

Properties/AssemblyInfo.cs

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+using System.Reflection;
+using System.Resources;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Windows;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("TaskManager")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("TaskManager")]
+[assembly: AssemblyCopyright("Copyright ©  2019")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components.  If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+//In order to begin building localizable applications, set
+//<UICulture>CultureYouAreCodingWith</UICulture> in your .csproj file
+//inside a <PropertyGroup>.  For example, if you are using US english
+//in your source files, set the <UICulture> to en-US.  Then uncomment
+//the NeutralResourceLanguage attribute below.  Update the "en-US" in
+//the line below to match the UICulture setting in the project file.
+
+//[assembly: NeutralResourcesLanguage("en-US", UltimateResourceFallbackLocation.Satellite)]
+
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
+                                     //(used if a resource is not found in the page,
+                                     // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
+                                              //(used if a resource is not found in the page,
+                                              // app, or any theme specific resource dictionaries)
+)]
+
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]