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some documentation on DefaultSurrogateSelector #77

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some documentation on DefaultSurrogateSelector #77

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8 changes: 8 additions & 0 deletions mcs/class/corlib/System.Runtime.Serialization.Formatters.Binary/BinaryFormatter.cs
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Expand Up @@ -58,6 +58,14 @@ public BinaryFormatter(ISurrogateSelector selector, StreamingContext context)
this.context=context;
}


// Deserializing objects of type Dictionary<,> List<> and friends does not work in a CoreCLR sandbox, because
// the default deserialization code uses reflection to do its job, and the fields being reflected on live in mscorlib.dll.
// DefaultSurrogateSelector enables embedders to provide an alternative method of deserializing specific types in a way
// that does not violate the CoreCLR rules. See https://gist.github.com/878267 for some actual code that provides CoreCLR safe
// deserialization code for List<> and Dictionary<,>.
// DefaultSurrogateSelector is private, and needs to be set by the embedder trough reflection, so we do not expose any public
// API point that is not present in .NET
static ISurrogateSelector DefaultSurrogateSelector { get; set; }

public FormatterAssemblyStyle AssemblyFormat
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