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Is there a tool available that can scan a C# or VB.NET project and automatically remove all unused local variables?

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Ahem: FxCop and ReSharper are nice and all, but the compiler will happily ignore unused variables and never even declare them in compiled code if you enable the optimize option.

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local variables can be ignored by the compiler, but they might hinder readability of the code by other human developers. depends of course on the code and how complex/ordered/commented it is.
Where is the optimize option?
3

You can use ReSharper. It will mark all unused variables and allow you to remove them.

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It looks like ReSharper should help you clean up your code.

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You can use FxCop to analyse your code.

Our you van install resharper that greys unused local variables out

With both tools you have to delete them your self

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Well, not exactly. ReSharper will not only hightlight the variables; it will also provide you the command to remove them one at a time.
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FxCop is a useful tool in a number of ways, one of which is that it will point out unused variables and parameters. This is helpful if you have your code going through a continuous integration process.

ReSharper will highlight unused variables and parameters when you are in Visual Studio.

Neither tool will automatically do the removal for you, although it's usually a simple thing to do...R# even provides a shortcut command to remove a single selected variable for you.

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