ReSharper and var

Question

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Why does ReSharper want to use 'var' for everything?

I have ReSharper 4.5 and have found it invaluable so far but I have a concern;
It seems to want to make every variable declaration implicit (var).
As a relatively new developer, how much should I trust ReSharper when it comes to this?

Take the below code snippet from a method that Paints Tab Headers.

TabPage currentTab = tabCaseNotes.TabPages[e.Index];
Rectangle itemRect = tabCaseNotes.GetTabRect(e.Index);
SolidBrush fillBrush = new SolidBrush(Color.Linen);
SolidBrush textBrush = new SolidBrush(Color.Black);
StringFormat sf = new StringFormat
{
    Alignment = StringAlignment.Center,
    LineAlignment = StringAlignment.Center
};

Resharper wants me to change all 5 of those to var. I have read the following similar post, Use of var keyword in C#, but I would like to know from a ReSharper standpoint.

Answer 1

Resharper is primarily concerned with helping you refactor code, and the var keyword generally makes refactoring easier. For example, if the return values of any of those functions ever change to a compatibile type, you don't have to change any of this code. It's therefore now a little easier to refactor your tabCaseNotes type, for example.

Personally, I'm often inclined to leave your first two lines alone, because I like to see the type name for a variable explicitly listed somewhere on the line where the variable is declared. If anything, I might look for an interface to use instead, so that I also gain the same "generic-ness" as with the var keyword without losing any important readable type information. However, I would definitely use var for fillBrush, textBrush, and sf.