Public Sub RemoveValue( _
   ByRef token As TransactionToken, _
   ByVal key As TKey _
) 

public void RemoveValue( 
   ref TransactionToken token,
   TKey key
)

using (TempFile tmp = new TempFile())
using (var log = new TransactionLog<int, string>(Options(tmp)))
{
    var token = log.BeginTransaction();
    log.RemoveValue(ref token, 1);
    log.CommitTransaction(ref token);

    var test = new Dictionary<int, string>();
    test.Add(1, null);
    log.ReplayLog(test);

    Assert.AreEqual(0, test.Count);
}

Using tmp As New TempFile()
    Using log As var = New TransactionLog(Of Integer, String)(Options(tmp))
        Dim token As var = log.BeginTransaction()
        log.RemoveValue(token, 1)
        log.CommitTransaction(token)

        Dim test As var = New Dictionary(Of Integer, String)()
        test.Add(1, Nothing)
        log.ReplayLog(test)

        Assert.AreEqual(0, test.Count)
    End Using
End Using