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    It’s a good idea but this function isn’t unique to NGS. It’s called Enumerable.Single on .NET and I wouldn’t be surprised if other platforms had an equivalent.

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      Thanks! I’ll take a look at which other interesting methods they have there. When claiming something as unique there is of course always a chance that the thing is already implemented somewhere else and I’m just not aware, like in this case.

      Edit: updated the post