C# version numbers correspond to the releases of the language specification and the .NET runtime. The version numbers for C# language versions are usually associated with the Visual Studio versions they are introduced with. Here are some examples of C# version numbers along with their associated releases:
C# 1.0: This was the initial version of C# released with .NET Framework 1.0 and Visual Studio .NET 2002.
C# 2.0: Released with .NET Framework 2.0 and Visual Studio 2005. It introduced features like generics, nullable value types, and anonymous methods.
C# 3.0: Released with .NET Framework 3.0 and Visual Studio 2008. It introduced features like LINQ (Language Integrated Query), lambda expressions, and extension methods.
C# 4.0: Released with .NET Framework 4.0 and Visual Studio 2010. It introduced features like dynamic typing (dynamic keyword), named and optional arguments, and covariance and contravariance in generic interfaces.
C# 5.0: Released with .NET Framework 4.5 and Visual Studio 2012. This version introduced the async and await keywords for asynchronous programming.
C# 6.0: Released with .NET Framework 4.6 and Visual Studio 2015. It introduced features like string interpolation, null-conditional operators, and expression-bodied members.
C# 7.0: Released with .NET Framework 4.7 and Visual Studio 2017. It introduced features like local functions, pattern matching, and tuples.
C# 7.1, 7.2, 7.3: These were minor versions released with improvements and features such as async main, ref readonly, in parameters, and more.
C# 8.0: Released with .NET Core 3.0 and Visual Studio 2019. It introduced features like nullable reference types, asynchronous streams, ranges and indices, and more.
C# 9.0: Released with .NET 5.0 and later versions. It introduced features like records, init-only properties, improved pattern matching, and more.
It's important to note that the version numbers correspond to the language specification and features, rather than the runtime versions. The latest version of C# is typically aligned with the latest .NET runtime and development tools.
When working with C#, you should use the version that matches your development environment to ensure compatibility with the available features and libraries.
C# 1.0: This was the initial version of C# released with .NET Framework 1.0 and Visual Studio .NET 2002.
C# 2.0: Released with .NET Framework 2.0 and Visual Studio 2005. It introduced features like generics, nullable value types, and anonymous methods.
C# 3.0: Released with .NET Framework 3.0 and Visual Studio 2008. It introduced features like LINQ (Language Integrated Query), lambda expressions, and extension methods.
C# 4.0: Released with .NET Framework 4.0 and Visual Studio 2010. It introduced features like dynamic typing (dynamic keyword), named and optional arguments, and covariance and contravariance in generic interfaces.
C# 5.0: Released with .NET Framework 4.5 and Visual Studio 2012. This version introduced the async and await keywords for asynchronous programming.
C# 6.0: Released with .NET Framework 4.6 and Visual Studio 2015. It introduced features like string interpolation, null-conditional operators, and expression-bodied members.
C# 7.0: Released with .NET Framework 4.7 and Visual Studio 2017. It introduced features like local functions, pattern matching, and tuples.
C# 7.1, 7.2, 7.3: These were minor versions released with improvements and features such as async main, ref readonly, in parameters, and more.
C# 8.0: Released with .NET Core 3.0 and Visual Studio 2019. It introduced features like nullable reference types, asynchronous streams, ranges and indices, and more.
C# 9.0: Released with .NET 5.0 and later versions. It introduced features like records, init-only properties, improved pattern matching, and more.
It's important to note that the version numbers correspond to the language specification and features, rather than the runtime versions. The latest version of C# is typically aligned with the latest .NET runtime and development tools.
When working with C#, you should use the version that matches your development environment to ensure compatibility with the available features and libraries.
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