Hi, I'm new to the C# world and I can't find a method to declare read only variable in C# (something like declaring "const" variable in c++). Is there one?

I'll give you an example:

...
int f() { return x; } // x is not const member
...
void g() {
    int readOnlyVar = f(); // is there a method to declare readOnlyVar as read only or const

    // Some code in which I want to restrict access to readOnlyVar to read only 
}