System.Security.Cryptography.X509Certificates.X509ExtensionCollection public sealed class X509ExtensionCollection : ICollection, IEnumerable Documentation public int Count { get; } public bool IsSynchronized { get; } public X509Extension this[int index] { get; } public X509Extension this[string oid] { get; } public object SyncRoot { get; } public X509ExtensionCollection() public int Add(X509Extension extension) public void CopyTo(X509Extension[] array, int index) public X509ExtensionEnumerator GetEnumerator()