Pastable version of .NET BusyIndicator

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            <span style="margin:0;padding:4px 6px;font-size:12px;float:right;">code</span>
            <pre style="float:left;margin:0 10px;border-right:0;color:#666;">1
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            <pre class="sunburst"><span style="color:#E28964;">public</span> <span style="color:#E28964;">static</span> <span style="color:#99CF50;">class</span> BusyIndicator
{
<span style="color:#E28964;">private</span> <span style="color:#E28964;">static</span> <span style="color:#E28964;">readonly</span> AsyncCallback   nullCallback    = <span style="color:#E28964;">delegate</span> { };
        <span style="color:#E28964;">private</span> <span style="color:#E28964;">static</span> <span style="color:#E28964;">readonly</span> <span style="color:#99CF50;">object</span>[]        emptyArray      = <span style="color:#E28964;">new</span> <span style="color:#99CF50;">object</span>[] { };

<span style="color:#E28964;">public</span> <span style="color:#E28964;">static</span> <span style="color:#E28964;">void</span> ShowWhile(Control control, ThreadStart method)
        {
            <span style="color:#E28964;">if</span> (method == <span style="color:#E28964;">null</span>)
                <span style="color:#E28964;">throw</span> <span style="color:#E28964;">new</span> ArgumentException(<span style="color:#65B042;"><span style="color:#65B042;">&quot;</span>Missing method definition<span style="color:#65B042;">&quot;</span></span>, <span style="color:#65B042;"><span style="color:#65B042;">&quot;</span>method<span style="color:#65B042;">&quot;</span></span>);

<span style="color:#E28964;">if</span> (control == <span style="color:#E28964;">null</span>)
            {
                method.BeginInvoke(nullCallback, emptyArray);
                <span style="color:#E28964;">return</span>;
            }

control.Cursor = Cursors.WaitCursor;
            MethodInvoker callback = <span style="color:#E28964;">delegate</span>   { control.Cursor = Cursors.Default; };
            AsyncCallback invoke   = <span style="color:#E28964;">delegate</span>   { control.Invoke(callback); };
            method.BeginInvoke(invoke, emptyArray);           
        }
    }

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<div style="overflow:auto;border:solid 1px #ccc;background:#000;color:#F8F8F8">
          <div class="section">
            <span style="margin:0;padding:4px 6px;font-size:12px;float:right;">sample usage</span>
            <pre style="float:left;margin:0 10px;border-right:0;color:#666;">1
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            <pre class="sunburst">BusyIndicator.ShowWhile(<span style="color:#E28964;">this</span>, <span style="color:#E28964;">delegate</span>
{
    <span style="color:#AEAEAE;font-style:italic;"><span style="color:#AEAEAE;font-style:italic;">//</span> Do stuff</span>
});
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