C# to Java Translation Expert Needed

I have an application in Java that needs to invoke a .NET dll and pass a structure as a parameter to a method. The structure is initially generated in C# and saved to a file, which Java app will read and invoke the DLL method in the same way as C#. I don't know how to save the structure in a file that can be read back by Java I've attached C# source code with an example - I want to save this structure in a file and read it back in Java as an automationRequest structure.