How to use a union using linq? : <p>I have two tables:</p>

<p>1) Customer Table
2) Custmer Email Table</p>

<p><a href="https://i.stack.imgur.com/DsTEk.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/DsTEk.png" alt="enter image description here"></a>
<a href="https://i.stack.imgur.com/sbRH5.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/sbRH5.png" alt="enter image description here"></a></p>

<p>what i want to get both email ids which have customerId=4.
can I make a union and get my desire result like:
**</p>

<pre><code>cusromerId:4
EmailId: sumit.printzone@gmail.com
         vinod.printzone@gmail.com
</code></pre>

<p>**</p>
