Comparing guarded ctor for IDisposables

GuardedCtors

public RethrowingCatch() {
    this.dependency = new Dependency();
    try {
        this.dependency.SomeProperty = "Blah";
    } catch (Exception) {
        dependency.Dispose();
        throw;
    }       
}

public ConditionalFinally() {
    bool needscleanup = true;
    this.dependency = new Dependency();
    try {
        this.dependency.SomeProperty = "Blah";
        needscleanup = false;
    } finally {
        if(needscleanup)  {
            dependency.Dispose();
        }
    }
}

public CleanupListFinally() {
    var cleanup = new List<IDisposable>();
    this.dependency = new Dependency();
    cleanup.Add(this.dependency);
    try {
        this.dependency.SomeProperty = "Blah";
        cleanup.Clear();
    } finally {
        foreach(var i in cleanup) {
            i.Dispose();
        }
    }
}