Merge pull request #228 from jhartmann123/225-transaction

Fixed exception when enqueuing a job within an existing transaction scope

Author: frankhommers

src/Hangfire.PostgreSql/EnvironmentHelpers.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Hangfire.PostgreSql
+{
+  internal class EnvironmentHelpers
+  {
+    private static bool? _isMono;
+
+    public static bool IsMono() =>
+      _isMono ??= Type.GetType("Mono.Runtime") != null;
+  }
+}

src/Hangfire.PostgreSql/PostgreSqlStorage.cs

@@ -1,4 +1,4 @@
-// This file is part of Hangfire.PostgreSql.
+// This file is part of Hangfire.PostgreSql.
 // Copyright © 2014 Frank Hommers <http://hmm.rs/Hangfire.PostgreSql>.
 // 
 // Hangfire.PostgreSql is free software: you can redistribute it and/or modify
@@ -237,7 +237,7 @@ internal T UseTransaction<T>(DbConnection dedicatedConnection,
     {
       isolationLevel = isolationLevel ?? IsolationLevel.ReadCommitted;
 
-      if (IsRunningOnWindows())
+      if (!EnvironmentHelpers.IsMono())
       {
         using (TransactionScope transaction = CreateTransaction(isolationLevel))
         {
@@ -319,15 +319,6 @@ private static void Current_TransactionCompleted(object sender, TransactionEvent
       }
     }
 
-    private static bool IsRunningOnWindows()
-    {
-#if !NETSTANDARD1_3
-      return Environment.OSVersion.Platform == PlatformID.Win32NT;
-#else
-            return System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform(System.Runtime.InteropServices.OSPlatform.Windows);
-#endif
-    }
-
     private static TransactionScope CreateTransaction(IsolationLevel? isolationLevel)
     {
       return isolationLevel != null