[07/07/15 13:50:32] [Server API] Verbose: TerrariaApi - Server v1.18.0.0 started.
[07/07/15 13:50:32] [Server API] Verbose: 	Command line: "D:\Games\Terraria\Terraria Solfware\Server\tshock_4.3.1_pre1\TerrariaServer.exe"
[07/07/15 13:50:32] [Server API] Verbose: 	OS: Microsoft Windows NT 5.1.2600 Service Pack 3 (64bit: False)
[07/07/15 13:50:32] [Server API] Verbose: 	Mono: False
[07/07/15 13:50:32] [Server API] Error: Startup aborted due to an exception in the Server API initialization:
System.InvalidOperationException: Plugin "TShock" has thrown an exception during initialization. ---> System.Exception: Fatal TShock initialization exception. See inner exception for details. ---> System.TypeLoadException: Could not load type 'System.Collections.Generic.IReadOnlyDictionary`2' from assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
   at Newtonsoft.Json.Utilities.CollectionUtils.IsDictionaryType(Type type)
   at Newtonsoft.Json.Serialization.DefaultContractResolver.CreateC
[13:50:52] >>	ontract(Type objectType)
   at Newtonsoft.Json.Serialization.DefaultContractResolver.ResolveContract(Type type)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter, Object value, Type objectType)
   at Newtonsoft.Json.JsonSerializer.SerializeInternal(JsonWriter jsonWriter, Object value, Type objectType)
   at Newtonsoft.Json.JsonConvert.SerializeObjectInternal(Object value, Type type, JsonSerializer jsonSerializer)
   at TShockAPI.ConfigFile.Write(Stream stream)
   at TShockAPI.ConfigFile.Write(String path)
   at TShockAPI.FileTools.SetupConfig()
   at TShockAPI.TShock.Initialize()
   --- End of inner exception stack trace ---
   at TShockAPI.TShock.Initialize()
   at TerrariaApi.Server.ServerApi.LoadPlugins()
   --- End of inner exception stack trace ---
   at TerrariaApi.Server.ServerApi.LoadPlugins()
   at TerrariaApi.Server.ServerApi.Initialize(String[] commandLineArgs, Main game)
   at Terraria.ProgramServer.InnerStart(String[] args)
[13:50:53] >>	:V