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copied!<p>You need <code>Option Infer On</code> and then just use the <code>Dim</code> keyword, thus:</p> <pre><code>Dim query = From x In y Where x.z = w Select x </code></pre> <p>Contrary to some of the other answers, you <em>do not</em> need <code>Option Strict On</code>.</p> <p>If you're using the VS IDE you can just hover over the variable names, but to get the compile-time types of variables (<code>GetType(variableName)</code> does not compile - "Type '<variablename>' is not defined." - and <code>VarType(variable)</code> is actually just the VB version of <code>variable.GetType()</code> which returns the type of the instance stored in the variable at runtime) I used:</p> <pre><code>Function MyVarType(Of T)(ByRef Var As T) As Type Return GetType(T) End Function </code></pre> <p>In detail:</p> <ul> <li><p>without <code>Dim</code>:</p> <p><code>Explicit Off</code>, gives <code>Object</code></p> <p><code>Explicit On</code>, error "Name '' is not declared."</p></li> <li><p>with <code>Dim</code>:</p> <ul> <li><code>Infer On</code>, gives expected types</li> <li><p><code>Infer Off</code>:</p> <p><code>Strict On</code>, error "Option Strict On requires all declarations to have an 'As' clasue."</p> <p><code>Strict Off</code>, gives <code>Object</code></p></li> </ul></li> </ul> <p>As I mentioned in the comments, there are <a href="https://github.com/dotnet/roslyn/issues/10457" rel="noreferrer">other reasons</a> why <code>Option Strict On</code> allows Linq to perform more usefully. Specifically, you can't get <code>Into Max(Anon.SomeString)</code> to work with <code>Option Strict Off</code>, though there are a number of workarounds.</p>

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