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Added missing collection interfaces to AV1130 #236

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Merged
dennisdoomen merged 1 commit into from
Feb 3, 2022
Merged

Added missing collection interfaces to AV1130 #236

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2 changes: 1 addition & 1 deletion _rules/1130.md
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Expand Up @@ -4,6 +4,6 @@ rule_category: member-design
title: Return interfaces to unchangeable collections
severity: 2
---
You generally don't want callers to be able to change an internal collection, so don't return arrays, lists or other collection classes directly. Instead, return an `IEnumerable<T>`, `IReadOnlyCollection<T>`, `IReadOnlyList<T>` or `IReadOnlyDictionary<TKey, TValue>`.
You generally don't want callers to be able to change an internal collection, so don't return arrays, lists or other collection classes directly. Instead, return an `IEnumerable<T>`, `IAsyncEnumerable<T>`, `IReadOnlyCollection<T>`, `IReadOnlyList<T>`, `IReadOnlySet<T>` or `IReadOnlyDictionary<TKey, TValue>`.

**Exception:** Immutable collections such as `ImmutableArray<T>`, `ImmutableList<T>` and `ImmutableDictionary<TKey, TValue>` prevent modifications from the outside and are thus allowed.