Hi.
When I have nested string.Format , then applying CC0048 will only solve first or selected one of them.
For example on this code:

var foo = string.Format( "{0}", string.Format( "{0}", 1 ) );

It will fix only one of them in one go. I think it would be good to solve them all at once.

Edit: Sorry I forgot to mention by using FixAll in Solution it will only fix one of them instead of both.
When those string.Formats are concatenated they are fixed correctly. Like in here:

var foo = string.Format( "{0}", 1 ) + string.Format( "{0}", 1 );