Updates for .NET 6 Preview 6.

global.json

@@ -1,12 +1,12 @@
 {
   "tools": {
-    "dotnet": "6.0.100-preview.5.21302.13",
+    "dotnet": "6.0.100-preview.6.21355.2",
     "runtimes": {
       "dotnet": [
-        "6.0.0-preview.5.21301.5"
+        "6.0.0-preview.6.21352.12"
       ],
       "aspnetcore": [
-        "6.0.0-preview.5.21301.17"
+        "6.0.0-preview.6.21355.2"
       ]
     }
   },

src/Microsoft.Tye.Hosting/Infrastructure/ServiceLoggerProvider.cs

@@ -37,9 +37,9 @@ namespace Microsoft.Tye.Hosting
                 _logs = logs;
             }
 
-            public IDisposable? BeginScope<TState>(TState state)
+            public IDisposable BeginScope<TState>(TState state)
             {
-                return null;
+                return new NoOpScope();
             }
 
             public bool IsEnabled(LogLevel logLevel)
@@ -59,6 +59,13 @@ namespace Microsoft.Tye.Hosting
                     _logs.OnNext(exception.ToString());
                 }
             }
+
+            private sealed class NoOpScope : IDisposable
+            {
+                public void Dispose()
+                {
+                }
+            }
         }
     }
 }

src/Microsoft.Tye.Hosting/TyeHost.cs

@@ -333,7 +333,7 @@ namespace Microsoft.Tye.Hosting
             }
             catch (Exception ex)
             {
-                _logger.LogError(ex, "Error while shutting down");
+                _logger?.LogError(ex, "Error while shutting down");
             }
             finally
             {
@@ -375,7 +375,7 @@ namespace Microsoft.Tye.Hosting
             }
             catch (Exception ex)
             {
-                _logger.LogError(ex, "Error launching dashboard.");
+                _logger?.LogError(ex, "Error launching dashboard.");
             }
         }