[BUG] GraphML serialization fails with WriteDelegateCompiler error "Operation is not supported on this platform."

Describe the bug

I used QuickGraph in oen of my Unity project. I have a GraphML serialization logic which perfectly works in Debug mode. However, when I run project in Release mode (see steps to reproduce), serialization always fails with stacktrace:

 System.TypeInitializationException: The type initializer for 'WriteDelegateCompiler' threw an exception. ---> System.PlatformNotSupportedException: Operation is not supported on this platform.
  at QuikGraph.Serialization.GraphMLSerializer`3+WriteDelegateCompiler[TVertex,TEdge,TGraph].CreateWriteDelegate (System.Type nodeType, System.Type delegateType) [0x00042] in <9ecb0810e6744db493d1d934627823d5>:0 
  at QuikGraph.Serialization.GraphMLSerializer`3+WriteDelegateCompiler[TVertex,TEdge,TGraph]..cctor () [0x00000] in <9ecb0810e6744db493d1d934627823d5>:0 
   --- End of inner exception stack trace ---
  at (wrapper managed-to-native) System.Object.__icall_wrapper_mono_generic_class_init(intptr)
  at QuikGraph.Serialization.GraphMLSerializer`3+WriterWorker[TVertex,TEdge,TGraph].WriteGraphHeader () [0x000f3] in <9ecb0810e6744db493d1d934627823d5>:0 
  at QuikGraph.Serialization.GraphMLSerializer`3+WriterWorker[TVertex,TEdge,TGraph].Serialize () [0x00018] in <9ecb0810e6744db493d1d934627823d5>:0 
  at QuikGraph.Serialization.GraphMLSerializer`3[TVertex,TEdge,TGraph].Serialize (System.Xml.XmlWriter writer, TGraph graph, QuikGraph.VertexIdentity`1[TVertex] vertexIdentity, QuikGraph.EdgeIdentity`2[TVertex,TEdge] edgeIdentity) [0x00049] in <9ecb0810e6744db493d1d934627823d5>:0 
  at QuikGraph.Serialization.GraphMLExtensions.SerializeToGraphML[TVertex,TEdge,TGraph] (TGraph graph, System.Xml.XmlWriter writer, QuikGraph.VertexIdentity`1[TVertex] vertexIdentity, QuikGraph.EdgeIdentity`2[TVertex,TEdge] edgeIdentity) [0x00005] in <9ecb0810e6744db493d1d934627823d5>:0 
  at QuikGraph.Serialization.GraphMLExtensions.SerializeToGraphML[TVertex,TEdge,TGraph] (TGraph graph, System.Xml.XmlWriter writer) [0x0002b] in <9ecb0810e6744db493d1d934627823d5>:0 

To Reproduce

Steps to reproduce the behavior:

1. Create any Unity project
2. Import QuickGraph and QuikGraph.Serialization packages
3. Write some code with GraphML serialization logic
4. Attach script to some GameObject
5. Build a Unity project in Release mode (File -> Build and Run)
6. Run project in Release mode
7. Serialization will fail

Expected behavior

Serialization will work. Also you can make a note in documentation instead that some platforms (which ones?) are not supported in the QuikGraph.Serialization package.

[KeRNeLith]

Yep I will close this issue and make a mention in the QuikGraph wiki/documentation. Thanks for your feedback that has been instructive and will be helpful for others!

[Vasar007]

Okay, thanks! I think I can try to use XML serialization. I don’t have any requirenments because I just work on my own pet project 😃

So, you are free to close this issue. But I think note in the documentation could help for other users in the future.