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Monday, November 17, 2008
Nullable type for Value types in C#
we cant initialize a value type variable with null, as it holds data directly unlike as refernce type which just have the refernce to the memory location.
int i = 0; //Correct
int i = Null; //Wrong.
In C# 2.0 we have Nullable types. Syntax asn usage is as below.
int ?i = null;
For Nullable types by default we get two properties HasValue,Value.
HasValue is a boolean value and it gives true if Nullable type has some value other than null else it gives false.
Value gives the value of Nullable Type variable i.
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