c# auto implemented property

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I have a project that does not seem to behave properly when using auto implemented properties.

When using get/set, it returns a null. But when explicitly telling it what to return it works great. For example, I only need to change this:

public string Symbol { get; set; }

to this:

C#

public string Symbol
{
    get { return _symbol; }
    set { _symbol = value; }
}

And it works great.

Does anyone have an explanation?

Posted 15-Nov-10 5:05am

wizardzz

Updated 3-Dec-10 4:06am

v3

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Comments

TheyCallMeMrJames 15-Nov-10 11:42am

make sure you comment on people's answers (don't add an answer yourself) or they won't get an email with your notes. cheers.

wizardzz 15-Nov-10 12:05pm

Thank you very much, Mr. James, I just noticed that you corrected this for me.

TheyCallMeMrJames 15-Nov-10 15:29pm

no worries. first one's free but after that it's a million bucks a pop. ;o)

3 solutions

Solution 1

No explanation but I just tried it and I had no problem with the auto implemented version.

Posted 15-Nov-10 5:24am

Henry Minute

Comments

TheyCallMeMrJames 15-Nov-10 11:41am

from OP: Thank you for trying it out Henry.

Solution 2

Maybe it helps to use Reflector[^] and take a look at the generated code when being compiled as an automatic property?

Cheers
Uwe

Posted 15-Nov-10 5:25am

Uwe Keim

Updated 15-Nov-10 5:45am

v2

Comments

TheyCallMeMrJames 15-Nov-10 11:42am

from OP: Uwe, I used reflector and the automatic property code looks identical to the code generated by the more explicit method.

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TheyCallMeMrJames · Accepted Answer · 2010-11-15T05:41:00

Solution 4

Do you have string _symbol defined? If you do, remove it and see if it works. You might have a collision there (though, that doesn't explain if you're actually getting null).

Basically, just make sure if you're using the shortcut that you're not also declaring the private member.

Cheers.

Posted 15-Nov-10 5:41am

TheyCallMeMrJames

Updated 15-Nov-10 5:46am

v2

Comments

wizardzz 15-Nov-10 11:51am

You got it, I did not think that this would make a difference to the compiler. I had to change the constructor of this class to use Symbol instead of _symbol now.