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Editorial Team
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Asked: 2026-05-20T01:15:52+00:00

I was curious about some serialization stuff so I went poking around FormatterServices and

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I was curious about some serialization stuff so I went poking around FormatterServices and found a method called nativeGetUninitializedObject that actually handles the initialization (without calling the custructor) of a given type. This method is decorated with the extern keyword and the following attribute: [MethodImpl(MethodImplOptions.InternalCall), SecurityCritical]

I’m left wondering: where does this method actually exist? What code does the CLR call to get the given type initialized (without calling the constructor)?

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1 Answer

  1. Editorial Team

    This method actually exists in the native portion of the CLR. The MethodImplOptions.InternalCall signifies a call which is forwarded to the CLR native code and is implemented there.

    From MSDN:

    Specifies an internal call. An internal call is a call to a method that is implemented within the common language runtime itself.

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