C# Blazor / Browser Support

System.Threading.Thread.Start() is not supported for browsers.

Instead, async/await with Task.Run is preferred, as it runs for all platforms (including browser).

The issue can be reproduced here: https://github.com/CloneDeath/SpacetimeWebChat

1. spacetime start
2. Publish the DB to quickstart-chat locally
3. Build and run the "WebClient" project
4. Navigate to the host in a browser, with the console open

Expected: No errors
Actual: You will see the below error printed to the console

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. blazor.webassembly.js:1:46936
 ---> System.PlatformNotSupportedException: Operation is not supported on this platform. blazor.webassembly.js:1:46936
   at System.Threading.Thread.ThrowIfNoThreadStart(Boolean internalThread) blazor.webassembly.js:1:46936
   at System.Threading.Thread.Start(Boolean captureContext, Boolean internalThread) blazor.webassembly.js:1:46936
   at System.Threading.Thread.Start() blazor.webassembly.js:1:46936
   at SpacetimeDB.DbConnectionBase`3[[SpacetimeDB.Types.DbConnection, WebClient, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[SpacetimeDB.Types.RemoteTables, WebClient, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[SpacetimeDB.Types.Reducer, WebClient, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]..ctor() blazor.webassembly.js:1:46936
   at SpacetimeDB.Types.DbConnection..ctor() in /home/nicholas/Projects/Games/MMO/quickstart-chat/WebClient/module_bindings/SpacetimeDBClient.g.cs:line 422 blazor.webassembly.js:1:46936
   at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Constructor(Object obj, IntPtr* args) blazor.webassembly.js:1:46936
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr) blazor.webassembly.js:1:46936
   --- End of inner exception stack trace --- blazor.webassembly.js:1:46936
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr) blazor.webassembly.js:1:46936
   at System.RuntimeType.CreateInstanceMono(Boolean nonPublic, Boolean wrapExceptions) blazor.webassembly.js:1:46936
   at System.RuntimeType.CreateInstanceOfT() blazor.webassembly.js:1:46936
   at System.Activator.CreateInstance[DbConnection]() blazor.webassembly.js:1:46936
   at SpacetimeDB.DbConnectionBuilder`1[[SpacetimeDB.Types.DbConnection, WebClient, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]..ctor() blazor.webassembly.js:1:46936
   at SpacetimeDB.DbConnectionBase`3[[SpacetimeDB.Types.DbConnection, WebClient, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[SpacetimeDB.Types.RemoteTables, WebClient, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[SpacetimeDB.Types.Reducer, WebClient, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].Builder() blazor.webassembly.js:1:46936
   at WebClient.ServerApi.ConnectToDB() in /home/nicholas/Projects/Games/MMO/quickstart-chat/WebClient/ServerApi.cs:line 32 blazor.webassembly.js:1:46936
   at WebClient.ServerApi.Run() in /home/nicholas/Projects/Games/MMO/quickstart-chat/WebClient/ServerApi.cs:line 22 blazor.webassembly.js:1:46936

Reproduce the issue with the listed spacetime start, database publish, WebClient build, and browser steps, then inspect the DbConnectionBase constructor and ServerApi.cs at lines 22 and 32. Review closed pull request #274 for prior context; done means the WebClient runs in the browser without the reported Thread.Start platform exception in the console.