Readable C# equivalent of Python slice operation

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What is the C# equivalent of Python slice operations?

my_list = ['a', 'b', 'c', 'd', 'e', 'f', 'g']
result1 = my_list[2:4]
result2 = my_list[1:]
result3 = my_list[:3]
result4 = my_list[:3] + my_list[4:]

Some of it is covered here, but it is ugly and doesn't address all the uses of slicing to the point of it not obviously answering the question.

equivalent slice python c#
7 Answers

As of C#8 slicing becomes a lot easier for indexed data structures.

var result1 = myList[2..5]; // end (5) is exclusive
var result2 = myList[1..^0]; // from index 1 to the end 
var result3 = myList[0..3]; // end (3) exclusive

Read more about Ranges and indices here and here.

user_58620710

Here's an extension:

public static IEnumerable<T> Slice<T>(this IEnumerable<T> source, int start = 0, int end = 0)
{
    start = (start >= 0) ? start : source.Count() + start;
    end = (end > 0) ? end : source.Count() + end;

    return source.Skip(start).Take(end - start);
}

Examples:

var input = new[] { 0, 1, 2, 3, 4, 5, 6, 7 };
numbers.Slice(1, 4);    // { 1, 2, 3 }
numbers.Slice(-3, -1);  // { 5, 6 }
numbers.Slice(5);       // { 5, 6, 7 }
numbers.Slice(end:-4);  // { 0, 1, 2, 3 }
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