Returns a read-only view onto a collection. The returned ICollection<T> interface only allows operations that do not change the collection: GetEnumerator, Contains, CopyTo, Count. The ReadOnly property returns false, indicating that the collection is read-only. All other methods on the interface throw a NotSupportedException.

public static ICollection<T> ReadOnly<T>(
	ICollection<T> collection
)

public:
generic<typename T>
static ICollection<T>^ ReadOnly(
	ICollection<T>^ collection
)