struct S { public int a; } S s; fixed (S* p = &s) { p++; }

byte* b = stackalloc byte[4]; b[3] = 255;

int[] arr = {1, 2}; fixed (int* p = arr) { p += 2; *p }

void* v; int* i = (int*)v; *i = 10;

int x = 5; int* p = &x; *(p + 1)