score:2
Accepted answer
var result = _client.getrecords().result
.selectmany(x => x.category)
.groupby(x => x)
.select(x => $"{x.key}-{x.count()}");
score:2
(await _client.getrecords()).selectmany(b => blog.category, (b, c) => new { blog = blog, cat = c })
Source: stackoverflow.com
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