public void TestAbuseClosedIndexInput()
{
using MockDirectoryWrapper dir = NewMockDirectory();
using (IndexOutput @out = dir.CreateOutput("foo", IOContext.DEFAULT))
{
@out.WriteByte((byte)42);
} // @out.close();
IndexInput @in = dir.OpenInput("foo", IOContext.DEFAULT);
@in.Dispose();
Assert.Throws <LuceneSystemException>(() => @in.ReadByte());
}