GCop153.md

GCop 153

"Instead use IEnumerable< T >.Lacks(T item)"

"Instead use IEnumerable< T >.Lacks(T item, bool caseSensitive)"

Rule description

Human brain can understand positive expressions and statements faster than negative ones. To improve code readability it is better to use Lacks rather than !Contains.

Example

if (!myStringList.Contains(myVar))
{
    ...
}

should be 🡻

if (myStringList.Lacks(myVar))
{
    ...
}