Standard ECMA-334 C# Language Specification
Publisher: Ecma International 2006
Number of pages: 553
This International Standard specifies the form and establishes the interpretation of programs written in the C# programming language. It specifies the representation of C# programs, syntax and constraints of the C# language, semantic rules for interpreting C# programs, and the restrictions and limits imposed by a conforming implementation of C#.
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by Rob Miles
The book on C# used by the Department of Computer Science in the University of Hull as the basis of the first year programming course. The key features: practice - do a lot of programming, study - look at programs written by other, and persistence.
by Faraz Rasheed
The book introduces the C# language and the .NET framework. It covers the C# basics, object oriented programming, interfaces, exceptions, delegates, database access with ADO.NET, Windows forms applications, multi-threading and asynchronous I/O.
by Joseph Albahari
An extensive online book on multithreading in C#. This tackles difficult issues such as thread safety, when to use Abort, Wait Handles vs Wait and Pulse, the implications of Apartment Threading in Windows Forms, using Thread Pooling, etc.
by Kurt Nørmark - Aalborg University
This is a teaching material about object-oriented programming, illustrated with use of the programming language C#. It is assumed, as a prerequisite, that the readers have some knowledge about imperative programming, preferably knowledge about C.