Refactore seq extensions (#815)

* refactored foreach

* use of switch insted of ifs

src/Microsoft.Tye.Extensions/Seq/SeqExtensions.cs

@@ -2,6 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+using System;
 using System.Linq;
 using System.Threading.Tasks;
 
@@ -47,39 +48,48 @@ namespace Microsoft.Tye.Extensions.Seq
                     seq.Volumes.Add(new VolumeBuilder(logPath, "seq-data", "/data"));
                 }
 
-                foreach (var s in context.Application.Services)
+                foreach (var serviceBuilder in context.Application.Services)
                 {
-                    if (object.ReferenceEquals(s, seq))
+                    if (ReferenceEquals(serviceBuilder, seq))
                     {
                         continue;
                     }
 
                     // make seq available as a dependency of everything.
-                    if (!s.Dependencies.Contains(seq.Name))
+                    if (!serviceBuilder.Dependencies.Contains(seq.Name))
                     {
-                        s.Dependencies.Add(seq.Name);
+                        serviceBuilder.Dependencies.Add(seq.Name);
                     }
                 }
             }
 
-            if (context.Operation == ExtensionContext.OperationKind.LocalRun)
+            switch (context.Operation)
             {
-                if (context.Options!.LoggingProvider is null)
-                {
-                    // For local development we hardcode the port and hostname
-                    context.Options.LoggingProvider = "seq=http://localhost:5341";
-                }
-            }
-            else if (context.Operation == ExtensionContext.OperationKind.Deploy)
-            {
-                foreach (var project in context.Application.Services.OfType<DotnetProjectServiceBuilder>())
-                {
-                    var sidecar = DiagnosticAgent.GetOrAddSidecar(project);
+                case ExtensionContext.OperationKind.LocalRun:
+                    {
+                        if (context.Options!.LoggingProvider is null)
+                        {
+                            // For local development we hardcode the port and hostname
+                            context.Options.LoggingProvider = "seq=http://localhost:5341";
+                        }
 
-                    // Use service discovery to find seq
-                    sidecar.Args.Add("--provider:seq=service:seq");
-                    sidecar.Dependencies.Add("seq");
-                }
+                        break;
+                    }
+                case ExtensionContext.OperationKind.Deploy:
+                    {
+                        foreach (var project in context.Application.Services.OfType<DotnetProjectServiceBuilder>())
+                        {
+                            var sidecar = DiagnosticAgent.GetOrAddSidecar(project);
+
+                            // Use service discovery to find seq
+                            sidecar.Args.Add("--provider:seq=service:seq");
+                            sidecar.Dependencies.Add("seq");
+                        }
+
+                        break;
+                    }
+                default:
+                    throw new ArgumentOutOfRangeException();
             }
 
             return Task.CompletedTask;