C# Visual C# 2005 Express version

Question

Hi 

i downloaded the c# programming word file book. in section you talk about downloading the Visual C# 2005 Express version. when

i go to microsoft to download this it is not listed. they have the visual studio express version. what is the difference?

i don't know what i am downloading here. is this the editor? is it the ide? 

i downloaded the visual studio express and then the .net sdk. which i also do not know what that is.

thanks Lee