Why not the C# 8 Indices and ranges does not implements like Python slice?

[GF-Huang]

Python no exception:

C# give me out of range:

I know that just a syntactic sugar of string.Substring, but why not implements like python? Even if need to inject length checking.

[Unknown6656]

There are several arguments for your proposal, as well as for the current implementation.
However, changing it now would be a breaking change, so this proposal would never be accepted.

Further, the correct place for this proposal is https://github.com/dotnet/runtime. This repo is only dedicated to the C# syntax, not the runtime's behaviour.

[CyrusNajmabadi]

but why not implements like python?

Because it seemed worse than the semantics we chose