Question

Consider the following code:

class C
{
    public int A { get; set; }
    public int B;

    public C(int a, int b)
    {
        this.A = A;    // Oops, bug! Should be `this.A = a`. No warning
        this.B = B;    // Oops, bug! Should be `this.B = b`. `warning CS1717: Assignment made to same variable; did you mean to assign something else?`
    }
}

A and B are almost exactly the same thing, but one has a bug I will miss.

Is there a way I can get catch the first case at compile time?

EDIT: Some of the answers & comments want to explain to me that properties and fields aren’t the same thing. I know that already. They explain why the compiler doesn’t have a warning here; I get that. But I wrote a bug, and I don’t like writing bugs. So my question is “How can I make sure I never, ever write this bug ever again?“

Answer 1

Potentially you could use a tool such as FxCop and write a custom rule using VisitAssignmentStatement:

Some examples:
Example1
Example2