Can C# 6.0 Features Run on .NET 4.0?

C# 6.0 on .NET 4.0: A Closer Look

While some sources state that .NET 4.6 is a prerequisite for C# 6.0, recent projects show that certain C# 6.0 features work seamlessly with .NET 4.0. This is achievable thanks to the Roslyn compiler's capability to target older frameworks. The key lies in whether the specific C# 6.0 feature relies on new framework functionality.

Features like null-conditional operators and auto-property initializers function correctly on .NET 4.0 because they don't necessitate framework-level support. However, challenges emerge when using features dependent on newer framework types. For instance, string interpolation leveraging IFormattable requires .NET 4.6 or later due to the introduction of System.FormattableString.

In summary, a selective subset of C# 6.0 features are compatible with .NET 4.0. The compatibility depends entirely on the underlying framework requirements of each individual feature. For features needing newer framework components, upgrading to .NET 4.6 or a later version becomes necessary.

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