Public Class BackgroundWriter 
   Inherits CSharpTest.Net.Bases.Disposable

public class BackgroundWriter : CSharpTest.Net.Bases.Disposable 

using (TestStream io = new TestStream())
using (BackgroundWriter wtr = new BackgroundWriter(io, false))
{
    wtr.Dispose();
    Assert.IsFalse(io.Disposed);
    io.Write(new byte[1], 0, 1);
}

Using io As New TestStream()
    Using wtr As New BackgroundWriter(io, False)
        wtr.Dispose()
        Assert.IsFalse(io.Disposed)
        io.Write(New Byte(1) {}, 0, 1)
    End Using
End Using