Initial add of three projects

VideoEnc/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>

VideoEnc/MailService.cs

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+using System;
+
+namespace VideoEnc
+{
+    public class MailService
+    {
+        public void OnVideoEncoded(object source, VideoEventArgs e)
+        {
+            Console.WriteLine("MailService: Sending an email..."+e.Video.Title);
+        }
+    }
+}

VideoEnc/MessageService.cs

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+using System;
+
+namespace VideoEnc
+{
+    public class MessageService
+    {
+        public void OnVideoEncoded(object source, VideoEventArgs e)
+        {
+            Console.WriteLine("MessageService: Sending a text message..."+e.Video.Title);
+        }
+    }
+}

VideoEnc/Program.cs

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+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace VideoEnc
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            var video = new Video() { Title = "Video 1" };
+            var videoEncoder = new VideoEncoder(); //publisher
+            var mailService = new MailService();  //subscriber
+            var messageService = new MessageService(); //subscriber
+
+            videoEncoder.VideoEncoded += mailService.OnVideoEncoded;
+            videoEncoder.VideoEncoded += messageService.OnVideoEncoded;
+
+            videoEncoder.Encode(video);
+        }
+
+    }
+}

VideoEnc/Properties/AssemblyInfo.cs

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+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// 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("VideoEnc")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("VideoEnc")]
+[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)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("8b61aeaf-981f-4509-a550-2da29838df66")]
+
+// 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")]

VideoEnc/Video.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace VideoEnc
+{
+    public class Video
+    {
+        public string Title { get; set; }
+    }
+}

VideoEnc/VideoEnc.csproj

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{8B61AEAF-981F-4509-A550-2DA29838DF66}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>VideoEnc</RootNamespace>
+    <AssemblyName>VideoEnc</AssemblyName>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+    <Deterministic>true</Deterministic>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="MailService.cs" />
+    <Compile Include="MessageService.cs" />
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="Video.cs" />
+    <Compile Include="VideoEncoder.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>

VideoEnc/VideoEncoder.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace VideoEnc
+{
+    public class VideoEventArgs : EventArgs
+    {
+        public Video Video { get; set; }
+    }
+
+    public class VideoEncoder
+    {
+        // 1- Define a delegate
+        // 2- Define an Event
+        // 3 Raise the event
+
+        public delegate void VideoEncodedEventHandler(object source, VideoEventArgs args);
+        public event VideoEncodedEventHandler VideoEncoded;
+
+        public void Encode(Video video)
+        {
+            Console.WriteLine("Encoding video...");
+            Thread.Sleep(3000);
+
+            OnVideoEncoded(video);
+        }
+
+        protected virtual void OnVideoEncoded(Video video)
+        {
+            if (VideoEncoded != null)
+                VideoEncoded(this, new VideoEventArgs() { Video =video });
+        }
+    }
+}

VideoEnc/bin/Debug/VideoEnc.exe.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>

VideoEnc/obj/Debug/VideoEnc.csproj.CoreCompileInputs.cache

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+6ca44b11e984b22a307d84830ebf5d6145c71a6d

VideoEnc/obj/Debug/VideoEnc.csproj.FileListAbsolute.txt

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+C:\Users\tommy\Source\Repos\TrainingAdvancedTechniques\VideoEnc\bin\Debug\VideoEnc.exe.config
+C:\Users\tommy\Source\Repos\TrainingAdvancedTechniques\VideoEnc\bin\Debug\VideoEnc.exe
+C:\Users\tommy\Source\Repos\TrainingAdvancedTechniques\VideoEnc\bin\Debug\VideoEnc.pdb
+C:\Users\tommy\Source\Repos\TrainingAdvancedTechniques\VideoEnc\obj\Debug\VideoEnc.csproj.CoreCompileInputs.cache
+C:\Users\tommy\Source\Repos\TrainingAdvancedTechniques\VideoEnc\obj\Debug\VideoEnc.exe
+C:\Users\tommy\Source\Repos\TrainingAdvancedTechniques\VideoEnc\obj\Debug\VideoEnc.pdb
+C:\Users\tommy\Source\Repos\TrainingAdvancedTechniques\VideoEnc\obj\Debug\VideoEnc.csprojAssemblyReference.cache