how nullable type different from normal type.i knew that for nullable type we can assign NULL value(specialy for value types)..i want to know what is the speciality in nullable type so that v can assign NULL to that...i am also want to know nullable types are another type or what?

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what is the difference between ref and out variables(in situation basis)....i know that ref should be initialized before its usage ...why its like that(what is the need of initializing ref)?

i think ...what u said is correct.... ..the error i am getting is "operator == can not be applied to operands of type T and T" thanks for ur reply .....

public class Comparer<T> { public static bool AreEqual(T o1, T o2) { return (o1 == o2); } } //problem is with O1 == o2 //Help me? //URGENT