ZwTerminateProcess failed with [DllImport]

I just want to use ZwTerminateProcess() native function through my C# Application.
I've been written this part of code :

Code:

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[DllImport("ntdll.dll")]
        public static extern NtStatus ZwTerminateProcess(
            [In]    [Optional] IntPtr ProcessHandle,
            [In]    NtStatus ExitStatus
            );

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but the compiler issues some error code :

Code:

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Error        2        The type or namespace name 'NtStatus' could not be found (are you missing a using directive or an assembly reference?)

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how Can I import this function ?

There's really no need to try to pinvoke to a kernel mode api when in user mode.

If you are trying to terminate a project, you can use the Process class methods or pinvoke to TerminateProcess api.

It's just for learning purpose dear dear arjay, I know what you are saying :)
may help me?

All you have to do is to define NtStatus.

I think if found the answer, I should define it as :
typedef int NTSTATUS
how to add this to C#?

Quote:

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Originally Posted by escap3

I think if found the answer, I should define it as :
typedef int NTSTATUS
how to add this to C#?

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I don't think you have to define that. Just treat it as an 'int' (i.e. instead of using NTSTATUS use Int32 or int).