What is the use of fixed statement

A) To stop the garbagecollector to move the objects in use
B) To dispose the object at the end of the defined scope
C) To tell the garbage collector to move the object is use
D) To fix the size of an object.

Interview Candidate
Jan 2nd, 2006
1
1559

Answer

Showing Answers 1 - 1 of 1 Answers

naveentej
Profile Answers by naveentej

Jan 7th, 2006

Ans: A
The fixed statement sets a pointer to a managed variable and "pins" that variable during the execution of statement.
Without fixed, pointers to managed variables would be of little use since garbage collection could relocate the variables unpredictably. (In fact, the C# compiler will not allow you to set a pointer to a managed variable except in a fixed statement.)
Eg: Class A { public int i; }
A objA = new A; // A is a .net managed type
fixed(int *pt = &objA.i) // use fixed while using pointers with managed
                               // variables
{
   *pt=45;              // in this block use the pointer the way u want
}