new Int32() usages in c#?

Question

C# compiler allows me to write :

int k=new Int32();

However , I can't assign any value to it.

2 questions

1) doesnt new create a Heap allocation , and if so , what about the stack<->value thing ?

2)I can't do nothing with int k=new Int32();. in what scenarios will I use it ?

Answer 1

All structs (and int/Int32 is a struct) allow new() usage, which just means: initialise the struct to default values, I.e. zero for all fields in the struct. Most structs are immutable - and primitives certainly are. Basically, what you have written is the same as:

int k=0;

You can do lots of things with that.... But you can't change any properties of zero. Zero is zero is zero.

new does not always mean "allocate on the heap".