Question

In dotNET we could write unmanaged code, where can I allocate memory dynamically (by keywords: stackalloc, new), use pointers etc.
It’s possible to free memory (for example by something like delete in C++)?

Answer 1

It depends how you allocate memory.

For example, if you allocate memory with AllocHGlobal :

double* vertices = (double*)Marshal.AllocHGlobal(
                          3 * count *  Marshal.SizeOf(typeof(double)));

You allocate the array of doubles of a given size.

To free that memory after you have to call FreeHGlobal

 Marshal.FreeHGlobal((IntPtr)vertices);

There are also other functions for allocating COM task memory, like

AllocCoTaskMem and relative FreeCoTaskMem