XmlSerializer type constructor is triggering a "Script execution failed"

[vvolkgang]

Hi,

My script does Xml deserialization using .NET's XmlSerializer, when my script creates a new instance with the type of my xml model, it triggers the following error and stops the execution (ran with logLevel debug):

DEBUG: Finished execution
ERROR: Script execution failed: The filename, directory name, or volume label syntax is incorrect. (Exception from HRESULT: 0x8007007B).
DEBUG: Terminating packs

Note: I've created my code in a VS .NET 4.5 console app project and afterwards migrated it to scriptcs, this worked as expected before the migration.

[adamralph]

@vvolkgang can you please provide a full example which recreates the problem?

[RogerMostad]

Well I have the same issue. It seems that the XmlSerializer constructor doesn't know about Roslyn Assemblies and is trying to load the Assembly? I am trying to create a XmlSerializer to serialize/deserialize an object declared in ScriptCS. It is late in the evening here on the West coast (after 6 am ;-) So I will see if I can reproduce it in a simple script. I am running a customized ScriptHost (Only adding additional Assemblies and Usings)

[RogerMostad]

Okay this seems to do the job:

#r "C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\System.Runtime.Serialization.dll"
using System.Xml.Serialization;

public class TestState
{
    public long Data;

    public TestState()
    {
        Data = 0;
    }
}

var serializer = new System.Xml.Serialization.XmlSerializer(typeof(TestState));
using (var tr = File.OpenRead(".\\TestState.xml"))
{
    var state = ((TestState)serializer.Deserialize(tr));
    Console.WriteLine("The answer: {0}", state.Data);
}

Here is the TestState.xml

<?xml version="1.0" encoding="utf-8"?>
<TestState>
    <Data>42</Data>
</TestState>

I get this:

The filename, directory name, or volume label syntax is incorrect. (Exception from HRESULT: 0x8007007B)

Right after the attempt to construct the XmlSerializer. Here is a cut an past Job into the ScriptCS (0.16.1) Command line:

> #r "C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\System.Runtime.Serialization.dll"
> using System.Xml.Serialization;
>
> public class TestState
* {
*     public long Data;
*
*     public TestState()
*     {
*         Data = 0;
*     }
* }
>
> var serializer = new System.Xml.Serialization.XmlSerializer(typeof(TestState));
The filename, directory name, or volume label syntax is incorrect. (Exception from HRESULT: 0x8007007B)
> using (var tr = File.OpenRead(".\\TestState.xml"))
* {
*     var state = ((TestState)serializer.Deserialize(tr));
*     Console.WriteLine("The answer: {0}", state.Data);
* }
(3,29): error CS0103: The name 'serializer' does not exist in the current context
>

[filipw]

This is the same error as here dotnet/roslyn#22859 - and it's a Roslyn bug