Make Exception serializable

[huan086]

I'm running JavaScript in my Entity Framework seed method. When an exception occurs, it throws
Type 'JavaScriptEngineSwitcher.Core.JsEngineLoadException' in assembly 'JavaScriptEngineSwitcher.Core, Version=2.0.3.0, Culture=neutral, PublicKeyToken=c608b2a8cc9e4472' is not marked as serializable.

So make exceptions serializable. See
https://blogs.msdn.microsoft.com/agileer/2013/05/17/the-correct-way-to-code-a-custom-exception-class/

[Taritsyn]

Hello, Huan!

I will fix this problem in the next release.

You have found the cause of the JsEngineLoadException? What JS engine are you using?

[huan086]

JsEngineLoadException was due to the new nuget package not having the native DLLs bundled by default. Installed the 2 native packages and the error went away.

Using ClearScript V8

[Taritsyn]

OK

[Daniel15]

Note that .NET Core doesn't have binary serialization, so you need to use conditional comments like this to only include the Serializable attribute (and constructor with SerializationInfo and StreamingContext) on .NET Framework and not .NET Core:

#if NET40 || NET45
    [Serializable]
#endif

eg. see https://github.com/reactjs/React.NET/blob/89bc9cbecef5e549f746d645d42706aa3a6d3219/src/React.Core/Exceptions/BabelException.cs#L18

[Taritsyn]

Hello, Huan!

In JavaScript Engine Switcher 2.1.2 fixed this error.