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Recently, I received the following notice from Visual Studio in a code similar to the image:
I understand what he wanted to say: there is a reference comparison of the two values (the session and the string "test"), and this will always return false, because any value stored in Session will never be referenced in the right string.
But why does it happen? Because Visual Studio was unable to make the comparison without a prior conversion?
PS: The same goes for ViewState
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Because Visual Studio was unable to make the comparison without a prior conversion?
Because the return of Session["teste"] is object, nay string. Not necessarily all that is in Session is string, so the warning. C# tries to compare two objects, which causes a fallback operator, changing the nature of the comparison to reference.
As stated in comment, use Session["teste"].ToString() to compare correctly.
So the comparison between two object shall always be of reference unless it is overwritten?
Exactly, but reimplementating the operator seems to me something insane.
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tries to put
Session["teste"].ToString()– Jeferson Almeida
Yes, I know it works, but I’d like to know why you need this conversion
– Artur Trapp