What’s new in .NET 6 and C# 10?

.NET 6 and C# 10 have brought many new features. We cannot visit them all but we explore a selection of those features that are leveraged in the book or that I thought were worth mentioning.

In this section, we explore the following C# 10 features:

• File-scoped namespaces
• Global using directives
• Implicit using directives
• Constant interpolated strings
• Record struct
• Minimal hosting model
• Minimal APIs
• Nullable reference types (added in C# 8 and enabled by default in .NET 6 templates)

File-scoped namespaces

Declaring a file-scoped namespace reduces the horizontal indentation of our code files by removing the need to declare a block ({}).

We previously wrote:

namespace Vehicles
{
    public interface IVehicleFactory
    {
        // Omitted members
    }
}

We now can write:

namespace Vehicles;
public interface IVehicleFactory
{
    // Omitted members
}

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