C#•2w ago

Compiler warnings about unused variables

I have a simple program

var a = 40;
var b = a;
var c = 20;

Console.WriteLine(a);

var a = 40;
var b = a;
var c = 20;

Console.WriteLine(a);

On my vscode, only c is underlined with this error: The variable 'c' is assigned but its value is never used Why is b not underlined? I mean it's dimmed but why isn't this a compiler warning as well?

6 Replies

Nasdack•2w ago

The warning is issued if and only if the assigned value is a compile-time constant.

cheeze2000OP•2w ago

i see thanks. do you know if there's any setting i can enable that detects b being unused

Nasdack•2w ago

b is already inspected and code analysis does tell that it is not being used

cheeze2000OP•2w ago

what i mean is maybe it shows up as a compile-time warning

Nasdack•2w ago

You can configure the severity of this inspection It is not a compiler warning, and you can't force it to be one You can however configure IntelliSense or ReSharper to change its severity

cheeze2000OP•2w ago

ok i'll look into it, thanks

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Compiler warnings about unused variables