Public Class ReadOnlyList(Of T) 
   Implements IReadOnlyCollection(Of T), CSharpTest.Net.Interfaces.ICloneable(Of ReadOnlyList(Of T)) 

public class ReadOnlyList<T> : IReadOnlyCollection<T>, CSharpTest.Net.Interfaces.ICloneable<ReadOnlyList<T>>  

ICollection read = new ReadOnlyList<int>((IEnumerable<int>)new int[] { 5, 10, 15 });
Assert.AreEqual(3, read.Count);
Assert.IsFalse(read.IsSynchronized);
Assert.IsTrue(Object.ReferenceEquals(read, read.SyncRoot));

long[] lary = new long[3];
read.CopyTo(lary, 0);
Assert.AreEqual(5L, lary[0]);
Assert.AreEqual(10L, lary[1]);
Assert.AreEqual(15L, lary[2]);

ICollection copy = (ICollection)((ICloneable)read).Clone();
Assert.AreEqual(3, copy.Count);

Dim read As ICollection = New ReadOnlyList(Of Integer)(DirectCast(New Integer() {5, 10, 15}, IEnumerable(Of Integer)))
Assert.AreEqual(3, read.Count)
Assert.IsFalse(read.IsSynchronized)
Assert.IsTrue([Object].ReferenceEquals(read, read.SyncRoot))

Dim lary As Long() = New Long(3) {}
read.CopyTo(lary, 0)
Assert.AreEqual(5L, lary(0))
Assert.AreEqual(10L, lary(1))
Assert.AreEqual(15L, lary(2))

Dim copy As ICollection = DirectCast((DirectCast(read, ICloneable)).Clone(), ICollection)
Assert.AreEqual(3, copy.Count)