set supportedRuntime to .net 2.0 in VS 2010 projects <p>I am trying to set supportedRuntime for my vb.net project which i created using VS 2010. Then i tried setting supportedRuntime for a sample application containing only form. In .config i have specified as shown below</p> <pre><code>&lt;startup&gt; &lt;supportedRuntime version="v2.0.50727"/&gt; &lt;supportedRuntime version="v4.0.30319"/&gt; &lt;/startup&gt; </code></pre> <p>When I try to open exe it does not open. If i specify .net 4 first and then .net 2 in config then it works.</p> <p>If project is created in VS 2008 then above supportedRuntime option works properly.</p> <p>So what is the error actually? Can't i set supportedRuntime to 2.0 in config file?</p>