Why do `select` and `sub` have brackets around them in VB Linq expressions?

I converted the following quer开发者_如何转开发y from C#:

src.Select((c, i) => src.Substring(i)).Count(sub => sub.StartsWith(target))

to the VB.NET query:

src.[Select](Function(c, i) src.Substring(i)).Count(Function([sub]) [sub].StartsWith(target))

Using Developer Fusion. I was just wondering why the VB.NET version has [] throughout.

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select and sub are keywords in VB.NET

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Sub and Select are keywords in VB.NET, so you have to mark them especially to be able to use them as variable names - in general using keywords as variable names should be avoided - just rename them and you can get rid of the braces.

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The reason why is that both Select and Sub are reserved words in VB.Net. The [] surrounding them is an escaping mechanism that causes them to not be treated as keywords

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A minor point: the .Select doesn't need the brackets:

src.Select(Function(c, i) src.Substring(i)).Count(Function([sub]) [sub].StartsWith(target))

works fine.