if (customer.Orders.Where(o => o.IsOverdue).Count() > 0)
{
SendReminder(customer);
}Deterministic line match: flags the method call `.Count()` with no arguments compared to 0 or 1 with any comparison operator, on either side.
ai-slop/csharp-linq-count
Count() emptiness check.
`.Count() > 0` or `.Count() == 0` used to ask whether a sequence has any elements. On a lazy enumerable it walks every element to answer a yes/no question.
Examples
Flagged shape and clean shape.
Each example shows the exact code shape the rule is looking for, then the smallest version that keeps the intent without hiding risk or adding noise.
if (customer.Orders.Any(o => o.IsOverdue))
{
SendReminder(customer);
}Use `.Any()` for the non-empty check and `!.Any()` for the empty one. On a materialized collection, the `Count` or `Length` property is also fine.
Why an AI agent produces this
Agents reach for the counting call by habit because it reads naturally, without considering what it costs on a query.
Provenance
How this rule is justified.
ai-slop/csharp-linq-count
ai-slop
Deterministic line match: flags the method call `.Count()` with no arguments compared to 0 or 1 with any comparison operator, on either side.
The `.Count` property of collections, `.Count(predicate)` calls, and comparisons against other numbers are not flagged.
Part of aislop's C# rule set. First-class C# support, including C#-specific AI-slop rules, arrived in aislop v0.14.1.