C# Versions and Features

C# versions

• C# 1 comes in 2002 with .NET framework 1.0 and Visual Studio 2002
• C# 2 comes in 2005 with .NET framework 2.0 and Visual Studio 2005
• C# 3 comes in 2008 with .NET framework 2.0 and Visual Studio 2008
• C# 4 comes in 2010 with .NET framework 4.0 and Visual Studio 2010
• C# 5 comes in 2012 with .NET framework 4.5 and Visual Studio 2012
• C# 6 preview comes in 2014 with .NET 2015 preview and Visual Studio 2013 extensions and Visual Studio 2015 preview

C# Features

C# 2.0 features

• Generics
• Partial types
• Anonymous Methods
• Nullable types
• Covariance and Contravariance

C# 3.0 features

• Implicit typed Local Variables
• Extension Methods
• Auto implemented properties
• Anonymous types
• Lambda expressions
• Expression tree
• Partial methods

C# 4.0 features

• dynamic type
• Named and optional arguments
• Generic covariant and contravariant
• Type Equivalence and Embedded Interop Types

C# 5.0 features

• Asynchronous methods
• Caller information attributes

C# 6.0 features

• Expression bodied methods
• Conditional access operator
• Primary constructor
• Await in catch block
• Exception filters
• String interpolation

.NET Framework Versions

• 1.0 comes with CLR version 1.0
• 1.1 comes with CLR version 1.1
• 2.0 comes with CLR version 2.0
• 3.0 comes with CLR version 2.0
• 3.5 comes with CLR version 2.0
• 4 comes with CLR version 4
• 4.5 (4.5.1 and 4.5.2) comes with CLR version 4
• 2015 preview comes with CLR version 4