C#: convert generic pointer to array

Question

I want to convert a byte* to a byte[], but I also want to have a reusable function to do this:

public unsafe static T[] Create

        

Answer 1

How about this?

static unsafe T[] MakeArray(void* t, int length, int tSizeInBytes) where T:struct
{
    T[] result = new T[length];
    for (int i = 0; i < length; i++)
    {
        IntPtr p = new IntPtr((byte*)t + (i * tSizeInBytes));
        result[i] = (T)System.Runtime.InteropServices.Marshal.PtrToStructure(p, typeof(T));
    }

    return result;
}

We can't use sizeof(T) here, but the caller can do something like

byte[] b = MakeArray(pBytes, lenBytes, sizeof(byte));