How get float3 array pixel from image to pointer

[8bitniksis]

Hi, thanks for solving the last problem, but I have a new problem.
Since I'm trying to add an OIDN in C#, I have a new problem, I need to get a pointer to an array of pixels where RGB = 3 floats, in C++ it's clear how implemented, but in C# the problem is, can you help?
I can attach the code