((DefaultInterpolatedStringHandler)(ref val))

[TheKolyian4ik]

I was trying to decompile tModLoader., change the code and compile. When I open the decompiled code in Visual Studio 2022 it gave me ~1500 errors. CS1525 Invalid expression term "ref" and a few CS1073

Here in tModLoader\UwUPnP\Gateway.cs every (ref val) gives an error

private static string BuildArgString((string Key, object Value) arg)
    {
        DefaultInterpolatedStringHandler val = default(DefaultInterpolatedStringHandler);
        ((DefaultInterpolatedStringHandler)(ref val))._002Ector(5, 3);
        ((DefaultInterpolatedStringHandler)(ref val)).AppendLiteral("<");
        ((DefaultInterpolatedStringHandler)(ref val)).AppendFormatted(arg.Key);
        ((DefaultInterpolatedStringHandler)(ref val)).AppendLiteral(">");
        ((DefaultInterpolatedStringHandler)(ref val)).AppendFormatted<object>(arg.Value);
        ((DefaultInterpolatedStringHandler)(ref val)).AppendLiteral("</");
        ((DefaultInterpolatedStringHandler)(ref val)).AppendFormatted(arg.Key);
        ((DefaultInterpolatedStringHandler)(ref val)).AppendLiteral(">");
        return ((DefaultInterpolatedStringHandler)(ref val)).ToStringAndClear();
    }

How do I fix this?

[dgrunwald]

This problem occurs when ILSpy could not load the assembly that defines DefaultInterpolatedStringHandler and gets confused whether it is dealing with a class or struct. Ensure you have the necessary reference assemblies loaded.

[TheKolyian4ik]

Thank you for explaining that. But which assembly defines DefaultInterpolatedStringHandler?

[greenozon]

@dgrunwald that type is a standard .NET type but it was added in .NET6

https://learn.microsoft.com/en-us/dotnet/api/system.runtime.compilerservices.defaultinterpolatedstringhandler?view=net-6.0

so the question to @TheKolyian4ik - do you have .NET6 (or higher) installed?

[TheKolyian4ik]

@greenozon yes, I do have .NET6 installed. But it still gives me

((DefaultInterpolatedStringHandler)(ref val))

also there is

 .ctor(5, 3);

or

_002Ector(5, 3);

which also gives errors.

[sgkoishi]

Try running dotnet --list-runtimes. Also, you can obtain the source from their repository to compile, without decompiling.