Unable to read from stream in Mono.Cecil

Question

I'm trying to load an assembly from a string-based stream in Cecil, however I keep getting System.BadImageFormatException and I can't seem to figure out what I'm doing wrong.

What I'm trying:

var data = File.ReadAllText("/path/to/dll");
using(Stream s = StreamFromString(data)) {
    var module = ModuleDefinition.ReadModule(s);
}

And StreamFromString is defined as:

return new MemoryStream(Encoding.UTF8.GetBytes(s ?? ""));

I've also tried:

MemoryStream stream = new MemoryStream();
StreamWriter writer = new StreamWriter(stream);
writer.Write(s);
writer.Flush();
stream.Position = 0;
return stream;

Using latest Cecil, .NET 4.5 on Windows Server 2012. Any ideas? Thanks :)

Edit: ModuleDefinition.ReadModule("/path/to/dll") works fine so it's not a corrupt dll issue.

Answer 1

我不完全确定它为什么能工作-但是使用File.ReadAllBytes读入字节数组并直接写入MemoryStream而不使用StreamWriter似乎已经解决了它。