# System.Collections.Generic

``` diff
 namespace System.Collections.Generic {
     public class List<T> : ICollection, ICollection<T>, IEnumerable, IEnumerable<T>, IList, IList<T>, IReadOnlyCollection<T>, IReadOnlyList<T> {
+        public int EnsureCapacity(int capacity);
     }
     public class Queue<T> : ICollection, IEnumerable, IEnumerable<T>, IReadOnlyCollection<T> {
+        public int EnsureCapacity(int capacity);
     }
     public class Stack<T> : ICollection, IEnumerable, IEnumerable<T>, IReadOnlyCollection<T> {
+        public int EnsureCapacity(int capacity);
     }
 }
```

