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C# New Features | C# Version Features

Microsoft has added too many new features in C# language. A list of newly added features in each versions are given below:

C# 2.0

• Partial types
• Iterators
• Nullable types
• Delegate Covariance
• Delegate inference
• Static classes
• Method group conversions (delegates)

C# 3.0

• Anonymous types
• Extension methods
• Query expression
• Partial method
• Implicitly typed local variables
• Object and collection initializers
• Auto-Implemented properties
• Lambda expression
• Expression trees

C# 4.0

• Dynamic binding
• Named and optional arguments
• Generic co and contravariance
• Embedded interop types (“NoPIA”)

C# 5.0

• Asynchronous methods
• Caller info attributes

C# 6.0

• Using static directive
• Exception filters
• Await in catch/finally blocks
• Auto property initializers
• Default values for getter-only properties
• Expression-bodied members
• Null propagator
• String interpolation
• Nameof operator
• Dictionary initializer
• Compiler-as-a-service (Roslyn)

C# 7.0

• Pattern matching
• Tuples
• Deconstruction
• Local functions
• Digit separator
• Binary literals
• Ref returns and locals
• Expression bodied constructors and finalizers
• Expression bodied getters and setters
• Out variables
• Generalized async return types

C# 7.1

• Async main
• Default expressions