Yes. Anything in blue is considered a reserved word.

>Hi,
>I started working with .NET in 2005 and love C# and C# compiler. Although I am still learning basics.
>
>Yesterday while thinking of how to name a class I came up with the name String. And of course, putting this class in my namespace made it very legal (as far as C# compiler is concerned). But I am still wondering, should I be concerned when naming my class the same as probably one of the most used classes in C#?