C# 2, or C# version 2.0, was released on November 07, 2005.
Here are select books about C# 2.
2005-03-04
Programming C#
Edition: 4
Series: Building .NET Applications
Author: Jesse Liberty
Publisher: O’Reilly
ISBN: 9780596006990
Type: Book
Format: Paperback
Price: US $55
On sale @ Amazon.
Shop @ O’Reilly.
2006-06-09
The C# Programming Language
Edition: 2
Series: Microsoft .NET Development
Author: Anders Hejlsberg, Scott Wiltamuth, and Peter Golde
Publisher: Pearson
ISBN: 9780321334435
Type: Book
Format: Hardcover
Price: US $40
On sale @ Amazon.
Shop @ Pearson.
2006-07-13
Essential C# 2.0
Edition: 1
Series: Microsoft .NET Development
Author: Mark Michaelis
Publisher: Pearson
ISBN: 9780321150776
Type: Book
Format: Paperback
Price: US $52
On sale @ Amazon.
Shop @ Pearson.
P4TE 