Why null check not working before method call?

I have one method in c#. Before calling method i checked not null condition of the parameter. But inside the method i didn’t check null condition. why it’s showing as bug? because i checked before calling a function. both the functions are in same file?


int[] data=null;

public void F1()
    if(data != null)
public void F2(int[] p1)
   var res=p1[0];

I’ve moved your post to the category on reporting false-positives.

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We’re missing some information (like the specific rule ID)


Hi @Anantham

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Hello @Anantham

Thank you for reaching out to us.
For the time being we don’t support cross method analysis. So, our analyzer does not know that a null check was done before the invocation.
On the other hand I would not call this a false positive, because there might be other invocations of F2 without the null check in place. I suggest to move the check inside F2.

All the best,


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