Error when doing POST on another project for the second time

Question

Taking as basis this link, that it was myself who posted, I will summarize so that you understand quickly...

I have a . NET Core 2.2 project and needed functionality that I only had in . NET Core 3.0, so I created a . NET Core 3.0 and I am making a request via POST that returns a string that can be a value or an error message...

1. The mistake that:

2. When it occurs:

It occurs when you make the second request, i.e., when the project . Net Core 2.2 calls 3.0 for the second time, when executing the method ExecuteInMemoryAssembly, this message appears on the line containing this code: var cr = compilation.Emit(ms);

IMPORTANT: If I stop the project and run again, repeat the situation, therefore the first time works correctly and in the second it gives the error. (In reality he crashes, then automatically the project to).

I looked for here, but I still don’t know how to solve:

E_INVALIDARG: One or more Arguments are not Valid

---

UPDATE 1:

private static void ExecuteInMemoryAssembly(Compilation compilation)
{
    try
    {
        ...
    }
    catch (Exception ex)
    {
        ex.Message;
    }
    finally
    {
        Dispose();
    }
}    

public void Dispose()
{
    Dispose(true);
    GC.SuppressFinalize(this);
}
protected virtual void Dispose(bool disposing)
{
    if (disposed)
        return;
    if (disposing)
    {
        handle.Dispose();
    }
    disposed = true;
}