CODEWITHSUNDEEP
c#visual-studiodebuggingvisual-studio-2017
Veselin Vasilev
Veselin Vasilev

Reputation: 3793

Variable is null, but right hand is not null

While debugging I noticed something weird:

enter image description here

the result var is shown as null, both in mouse hover and in the watch, but the right hand side is actually returning non-null value as you can see in the watch.

Any ideas why?

EDIT: the result variable is also declared in the IF statement, something like this:

if (somethingIsTrue) { var result = xxx; }
else { var result = yyy; }

As soon as I renamed the second result to something else, all started showing correctly.

Upvotes: 0

Views: 120

Answers (1)

Hans Kesting
Hans Kesting

Reputation: 39338

When your code is like this

if (somethingIsTrue) { var result = xxx; } else { var result = yyy; }

Then that 'result' variable is (re)declared within the scope of that if-statement. That means the value is only available within that block.

Solution: declare the variable outside of the block (if you haven't done that already) and remove the 'var's inside the 'if' and 'else' blocks

Upvotes: 2

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