CA1010Design Enabled by default: No

Collections should implement generic interface

Description

To broaden the usability of a collection, implement one of the generic collection interfaces. Then the collection can be used to populate generic collection types such as the following:

System.Collections.Generic.List`1
System.Collections.Generic.Queue`1
System.Collections.Generic.Stack`1

Cause

A type implements the System.Collections.IEnumerable interface but does not implement the System.Collections.Generic.IEnumerable`1 interface, and the containing assembly targets .NET. This rule ignores types that implement System.Collections.IDictionary.

By default, this rule only looks at externally visible types, but this is configurable. You can also configure additional interfaces to require that a generic interface be implemented.

How to fix violations

To fix a violation of this rule, implement one of the following generic collection interfaces:

System.Collections.Generic.IEnumerable`1
System.Collections.Generic.ICollection`1
System.Collections.Generic.IList`1

Example

#pragma warning disable CA1010
// The code that's violating the rule is on this line.
#pragma warning restore CA1010

When to suppress

It is safe to suppress a warning from this rule; however, the use of the collection will be more limited.

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