Csharp 12

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Primary constructors

Cs.svg 
public class Item
{
    public readonly string Name { get; }

    public Item (string name)
    {
        Name = name;
    }
}

// equivalent with a primary constructor
public class Item(string name)
{
    public readonly string Name { get; } = name;
}

Collection Expressions

Cs.svg 
// initialization
int[] a     = [1, 2, 3];
List<int> l = [4, 5, 6];

// concat items from different collections with the spread element: ..e
int[] all = [.. a, .. l];
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