decompile .NET Replace method (v4.6.1)

Question

I want to see how the

public String Replace(String oldValue, String newValue);

method that is inside mscorlib.dll (System.String) works.

I decompiled the mscorlib.dll with dotPeek and inside the method there is a call to ReplaceInternal method which I cannot find it

string s = ReplaceInternal(oldValue, newValue);

I have search for this method even on the open source .NET Core from GIT but no luck.

Please explain where is this method and what is inside?

Answer 1

The extern C++ code is here.

https://github.com/gbarnett/shared-source-cli-2.0/blob/master/clr/src/vm/comstring.cpp

Line 1578 has

FCIMPL3(Object*, COMString::ReplaceString, StringObject* thisRefUNSAFE, StringObject* oldValueUNSAFE, StringObject* newValueUNSAFE)