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    copied!<p>When using the configuration merge, it's best to handle each level of the block separately.</p> <p>First up, your example only tries to avoid collision on the /configuration element, which is in every web.config file.</p> <p>Next up, you need to separate out each part - this is important for the uninstall as well.</p> <p>In your example, you've got several levels - <code>&lt;system.servicemodel&gt; , &lt;bindings&gt;, &lt;basicHttpBinding&gt;</code> etc.</p> <p>What you need to do is split out these independently so they can be identified by the 'key' of each element (ie name, address - whatever it is). This allows the merge engine to identify a collision and do the update.</p> <p>The following is just a guess, but should be a useful jumping off point. It's not easy to figure out and the documentation in this area is a bit sparse. I ended up deep-diving into the source code to figure this one out myself.</p> <pre><code>&lt;component type="Config"&gt; &lt;config&gt; &lt;configFile&gt;web.config&lt;/configFile&gt; &lt;install&gt; &lt;configuration&gt; &lt;nodes&gt; &lt;node path="/configuration" targetpath="/configuration/system.serviceModel" action="update" collision="ignore"&gt; &lt;system.serviceModel&gt; &lt;bindings&gt; &lt;basicHttpBinding&gt; &lt;/basicHttpBinding&gt; &lt;/bindings&gt; &lt;client&gt; &lt;/client&gt; &lt;/system.serviceModel&gt; &lt;/node&gt; &lt;node path="/configuration/system.serviceModel/bindings/basicHttpBinding" action="update" key="name" collision="overwrite"&gt; &lt;binding name="xxx"&gt; &lt;/binding&gt; &lt;/node&gt; &lt;node path="/configuration/system.serviceModel/client" action="update" key="address" collision="overwrite"&gt; &lt;endpoint address="http://xxx" binding="basicHttpBinding" bindingConfiguration="xxx" contract="xxx" name="xxx" /&gt; &lt;/node&gt; &lt;/nodes&gt; &lt;/configuration&gt; &lt;/install&gt; &lt;/config&gt; &lt;/component&gt; </code></pre> <p><strong>Edit:</strong> The targetpath-attribute has to be written in lower case, otherwise the installer will create duplicate elements. (Original answer: targetPath)</p>
 

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