TheLeakSpreads.cs

object instance;

var constructionExceptions = Construct(testClass, out instance);
if (constructionExceptions.Any())
{
    foreach (var @case in cases)
        @case.Exceptions.Add(constructionExceptions);
}
else
{
    //...run all the test cases here, collecting exceptions along the way...


    var disposalExceptions = Dispose(instance);
    if (disposalExceptions.Any())
    {
        foreach (var @case in cases)
            @case.Exceptions.Add(disposalExceptions);
    }
}