Difference between value typeand reference type integer.

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Hi,

I used to think that reference type cannot contain valuetype.....Please help.
question-
if int a=15 is value type. and
int b=new int() is reference type.
Then why b=a is allowed????

Please help.

Posted 12-Jan-13 4:16am

vicvis

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Solution 2

int b = new int() is not a reference type, it is the same as saying int b = 0; Just because the new operator is used does not mean you are getting a reference type.
That being said, int[] b = new int[10] does result in a reference type on the array object itself, but each of the members are still value types.

For a better explanation, see MSDN Documentation here[^].
MSDN: Value Types[^]

Posted 12-Jan-13 4:26am

fjdiewornncalwe

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vicvis 13-Jan-13 8:53am

Thanks for your answer and guiding to right direction.I think i must study new a bit more about new operator.

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OriginalGriff · Accepted Answer · 2013-01-12T04:25:00

C#

int b=new int();

Does not create a reference type - it creates a value type. int is always a value type, the new int() syntax is just allowed for completion, it does not create any new allocation on the heap, and does not return a reference.
If you have a look at the IL it generates the same code:

C#

int A = new int();
int B = 0;

.locals init ([0] int32 A,
              [1] int32 B)
IL_0000:  nop
IL_0001:  ldc.i4.0
IL_0002:  stloc.0
IL_0003:  ldc.i4.0
IL_0004:  stloc.1