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    <p>This line:</p> <pre><code>selectionBox.Items.Add(m.mName); </code></pre> <p>Is merely ading the name of the <code>module</code> to <code>selectionBox</code>, which would explain why you were having problems trying to cast a <code>string</code> to a <code>module</code>. What you need to look into is using databinding. Add this code in place of the <code>foreach (object o in module)</code> loop:</p> <pre><code>selectionBox.DataSource = module; selectionBox.DisplayMember = "mName"; </code></pre> <p>And in the index changed event you can retrieve the selected item like this:</p> <pre><code>modules m = (modules)selectionBox.SelectedItem; </code></pre> <p>Further, if you do retrieve the selected item in this way you can do away with the <code>for</code> loop you currently have in the index changed event handler.</p> <p><strong>Edit:</strong></p> <p>Currently you are adding the names of each <code>module</code> to the <code>selectionBox</code>. However, when you go to retrieve the selected item, you are getting an error as you are attempting to cast the name of the object to the actual object.</p> <p>So using my solution:</p> <pre><code>selectionBox.DataSource = module; </code></pre> <p>Assigns the list of objects you create to be the <code>DataSource</code> (i.e., where it gets its data from) of <code>selectionBox</code>, and</p> <pre><code>selectionBox.DisplayMember = "mName"; </code></pre> <p>Indicates which property of the object should be used as the display text. In this case I have <code>mName</code> as this was the property you were previously adding to <code>selectionBox</code>.</p>
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    1. POCannot change labels using listbox selected item via class
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    1. COI am not sure I understand what you mean? If it helps I have a submit button in the form which creates an XML and saves the values I have selected and moved to another list and displays them correctly.
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    2. CO@user2157179 Which bit do you not understand?
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    3. COWell I have just added the code you suggested however got an error saying "Coursework1.Form1.module is a field but is used like a type" and the thing I dont understand is what is happening, so in the "selectionBox.DataSource = module; selectionBox.DisplayMember = "mName";" am I adding the mName to the listbox I cannot check this because I get an error.
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