public TKey this[int index] { get { return(_dict.GetKey(index)); } set { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_KeyCollectionSet); } }
public TKey this[int index] { get { return(_dict.GetKey(index)); } set { throw new NotSupportedException(SR.NotSupported_KeyCollectionSet); } }
public TKey this[int index] { get { return(_dict.GetKey(index)); } set { throw new NotSupportedException(); } }