sharing state among testmethods mstest

how i share state among testmethods mstest. tests run systematic tests sequence.

    private testcontext testcontext;

    open testcontext testcontext
    {
        { relapse this.testcontext; }
        set { this.testcontext = value;}
    }

    [testmethod]
    open vacant subscribe()
    {
        bool subscribed = true;
        testcontext.properties.add("subscribed", subscribed);
        assert.istrue(subscribed == true, string.format("subscribed...{0}", this.gethashcode()));
    }


    [testmethod]
    open vacant generateevent()
    {
        bool subscribed = (bool)testcontext.properties["subscribed"];
        assert.istrue(subscribed == true, string.format("subscribed...{0}", this.gethashcode()));

    }

thanks advance.