update to the newest CommandLineParser API

src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj

@@ -38,9 +38,6 @@
     <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="CommandLine">
-      <HintPath>..\packages\CommandLineParser.1.9.71\lib\net45\CommandLine.dll</HintPath>
-    </Reference>
     <Reference Include="Moq">
       <HintPath>..\packages\Moq.4.2.1510.2205\lib\net40\Moq.dll</HintPath>
     </Reference>
@@ -75,6 +72,9 @@
     <Reference Include="Google.Apis.Auth.PlatformServices">
       <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
     </Reference>
+    <Reference Include="CommandLineParser.Unofficial">
+      <HintPath>..\packages\CommandLineParser.Unofficial.2.0.275\lib\net45\CommandLineParser.Unofficial.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">

src/csharp/Grpc.IntegrationTesting/InteropClient.cs

@@ -84,19 +84,6 @@ namespace Grpc.IntegrationTesting
 
             [Option("service_account_key_file", Required = false)]
             public string ServiceAccountKeyFile { get; set; }
-
-            [HelpOption]
-            public string GetUsage()
-            {
-                var help = new HelpText
-                {
-                    Heading = "gRPC C# interop testing client",
-                    AddDashesToOption = true
-                };
-                help.AddPreOptionsLine("Usage:");
-                help.AddOptions(this);
-                return help;
-            }
         }
 
         ClientOptions options;
@@ -108,14 +95,13 @@ namespace Grpc.IntegrationTesting
 
         public static void Run(string[] args)
         {
-            var options = new ClientOptions();
-            if (!Parser.Default.ParseArguments(args, options))
-            {
-                Environment.Exit(1);
-            }
-
-            var interopClient = new InteropClient(options);
-            interopClient.Run().Wait();
+            var parserResult = Parser.Default.ParseArguments<ClientOptions>(args)
+                .WithNotParsed(errors => Environment.Exit(1))
+                .WithParsed(options =>
+                {
+                    var interopClient = new InteropClient(options);
+                    interopClient.Run().Wait();
+                });
         }
 
         private async Task Run()

src/csharp/Grpc.IntegrationTesting/InteropServer.cs

@@ -57,19 +57,6 @@ namespace Grpc.IntegrationTesting
             // Deliberately using nullable bool type to allow --use_tls=true syntax (as opposed to --use_tls)
             [Option("use_tls", Default = false)]
             public bool? UseTls { get; set; }
-
-            [HelpOption]
-            public string GetUsage()
-            {
-                var help = new HelpText
-                {
-                    Heading = "gRPC C# interop testing server",
-                    AddDashesToOption = true
-                };
-                help.AddPreOptionsLine("Usage:");
-                help.AddOptions(this);
-                return help;
-            }
         }
 
         ServerOptions options;
@@ -81,14 +68,13 @@ namespace Grpc.IntegrationTesting
 
         public static void Run(string[] args)
         {
-            var options = new ServerOptions();
-            if (!Parser.Default.ParseArguments(args, options))
-            {
-                Environment.Exit(1);
-            }
-
-            var interopServer = new InteropServer(options);
-            interopServer.Run();
+            var parserResult = Parser.Default.ParseArguments<ServerOptions>(args)
+                .WithNotParsed(errors => Environment.Exit(1))
+                .WithParsed(options =>
+                {
+                    var interopServer = new InteropServer(options);
+                    interopServer.Run();
+                });
         }
 
         private void Run()

src/csharp/Grpc.IntegrationTesting/QpsWorker.cs

@@ -54,19 +54,6 @@ namespace Grpc.IntegrationTesting
         {
             [Option("driver_port", Default = 0)]
             public int DriverPort { get; set; }
-
-            [HelpOption]
-            public string GetUsage()
-            {
-                var help = new HelpText
-                {
-                    Heading = "gRPC C# performance testing worker",
-                    AddDashesToOption = true
-                };
-                help.AddPreOptionsLine("Usage:");
-                help.AddOptions(this);
-                return help;
-            }
         }
 
         ServerOptions options;
@@ -78,14 +65,13 @@ namespace Grpc.IntegrationTesting
 
         public static void Run(string[] args)
         {
-            var options = new ServerOptions();
-            if (!Parser.Default.ParseArguments(args, options))
-            {
-                Environment.Exit(1);
-            }
-
-            var workerServer = new QpsWorker(options);
-            workerServer.RunAsync().Wait();
+            var parserResult = Parser.Default.ParseArguments<ServerOptions>(args)
+                .WithNotParsed((x) => Environment.Exit(1))
+                .WithParsed(options =>
+                {
+                    var workerServer = new QpsWorker(options);
+                    workerServer.RunAsync().Wait();
+                });
         }
 
         private async Task RunAsync()

src/csharp/Grpc.IntegrationTesting/StressTestClient.cs

@@ -71,19 +71,6 @@ namespace Grpc.IntegrationTesting
 
             [Option("metrics_port", Default = 8081)]
             public int MetricsPort { get; set; }
-
-            [HelpOption]
-            public string GetUsage()
-            {
-                var help = new HelpText
-                {
-                    Heading = "gRPC C# stress test client",
-                    AddDashesToOption = true
-                };
-                help.AddPreOptionsLine("Usage:");
-                help.AddOptions(this);
-                return help;
-            }
         }
 
         ClientOptions options;
@@ -105,23 +92,21 @@ namespace Grpc.IntegrationTesting
 
         public static void Run(string[] args)
         {
-            var options = new ClientOptions();
-            if (!Parser.Default.ParseArguments(args, options))
-            {
-                Environment.Exit(1);
-            }
-
-            GrpcPreconditions.CheckArgument(options.NumChannelsPerServer > 0);
-            GrpcPreconditions.CheckArgument(options.NumStubsPerChannel > 0);
+            var parserResult = Parser.Default.ParseArguments<ClientOptions>(args)
+                .WithNotParsed((x) => Environment.Exit(1))
+                .WithParsed(options => {
+                    GrpcPreconditions.CheckArgument(options.NumChannelsPerServer > 0);
+                    GrpcPreconditions.CheckArgument(options.NumStubsPerChannel > 0);
 
-            var serverAddresses = options.ServerAddresses.Split(',');
-            GrpcPreconditions.CheckArgument(serverAddresses.Length > 0, "You need to provide at least one server address");
+                    var serverAddresses = options.ServerAddresses.Split(',');
+                    GrpcPreconditions.CheckArgument(serverAddresses.Length > 0, "You need to provide at least one server address");
 
-            var testCases = ParseWeightedTestCases(options.TestCases);
-            GrpcPreconditions.CheckArgument(testCases.Count > 0, "You need to provide at least one test case");
+                    var testCases = ParseWeightedTestCases(options.TestCases);
+                    GrpcPreconditions.CheckArgument(testCases.Count > 0, "You need to provide at least one test case");
 
-            var interopClient = new StressTestClient(options, serverAddresses.ToList(), testCases);
-            interopClient.Run().Wait();
+                    var interopClient = new StressTestClient(options, serverAddresses.ToList(), testCases);
+                    interopClient.Run().Wait();
+                });
         }
 
         async Task Run()

src/csharp/Grpc.IntegrationTesting/packages.config

 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
-  <package id="CommandLineParser" version="1.9.71" targetFramework="net45" />
+  <package id="CommandLineParser.Unofficial" version="2.0.275" targetFramework="net45" />
   <package id="Google.Apis.Auth" version="1.15.0" targetFramework="net45" />
   <package id="Google.Apis.Core" version="1.15.0" targetFramework="net45" />
   <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />