Where is the source code for System.String for .Net Core?

The String class for older versions should be at http://referencesource.microsoft.com/#mscorlib/system/string.cs. Where can I find the class for .Net Core. And also where can I find StringNative.cpp which is a base for this?

Jon Skeet
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All the .NET Core source code is on Github, broken into corefx for the BCL beyond the bits that the CLR really depends on and coreclr for the CLR and the core parts of the BCL (like string).

stringnative.cpp is the native part of the CoreCLR string implementation, and String.cs contains the managed code.

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