Why does the String class not have a parameterless constructor?

Question

int and object have a parameterless constructor. Why not string?

Answer 1

As said before, strings are immutable and therefore if you manipulate a string you actually create a new one every time.

Example:

string s = "str"; // str was created in the memory.
s += "2"; // str2 was created in the memory.

Use StringBuilder when you want to manipulate string(that's why you wanted an empty ctor, right?)