Collection Expressions in C#12

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Collection Expressions in C#12
the old way of initializing arrays:
int[] numbers = new int[] { 1, 2, 3 };

In C#12 we can declare without using new int[]
int[] numbers = { 1, 2, 3 };

C#12 introduces the spread operator (..) which includes elements from other collections.
Example: List (string) colors = ["red", "green", ..existingColors];


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