Could not install package '--'. You are trying to install this package into a project that targets '.NETFramework,Version=v4.5' : <p>I created this package, I need it in a project but couldn't install it, this error appears:</p>

<blockquote>
  <p>Could not install package 'Mshwf.NiceLinq 1.0.9'. You are trying to
  install this package into a project that targets
  '.NETFramework,Version=v4.5', but the package  does not contain any
  assembly references or content files that are compatible with that
  framework. For more information, contact the package author</p>
</blockquote>

<p>I don't  know why this happen, in another project (Console) I changed the framework to 4.6 and other versions and it wasn't a problem, but this only happen in this project (MVC and Web API):</p>

<p>this is the nuspec file:</p>

<pre><code>&lt;?xml version="1.0"?&gt;
&lt;package &gt;
  &lt;metadata&gt;
    &lt;id&gt;Mshwf.NiceLinq&lt;/id&gt;
    &lt;version&gt;1.0.9&lt;/version&gt;
    &lt;title&gt;Nice LINQ&lt;/title&gt;
    &lt;authors&gt;MShawaf&lt;/authors&gt;
    &lt;owners&gt;Mshawaf&lt;/owners&gt;
    &lt;projectUrl&gt;https://github.com/mshwf/NiceLinq&lt;/projectUrl&gt;
    &lt;iconUrl&gt;https://raw.githubusercontent.com/mshwf/NiceLinq/master/logo.png&lt;/iconUrl&gt;
    &lt;requireLicenseAcceptance&gt;false&lt;/requireLicenseAcceptance&gt;
    &lt;description&gt;See it as: WHERE ID IN (1, 2, 3, 7, 9, 22, 30, 101)&lt;/description&gt;
    &lt;releaseNotes&gt;Minor changes.&lt;/releaseNotes&gt;
    &lt;copyright&gt;Copyright 2016&lt;/copyright&gt;
    &lt;tags&gt;LINQ IEnumerable Where Contains Search Filter&lt;/tags&gt;
  &lt;/metadata&gt;
&lt;/package&gt;
</code></pre>
