Databases
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    <p>Why do we know that to be false? The line</p> <pre><code>Database testDatabase = sampleDatabaseList[0]; </code></pre> <p>invokes the indexer with the parameter <code>0</code> which is a <code>int</code> literal and therefore, seeing that <code>DatabaseList</code> inherits from <code>HierarchialItemList&lt;Database&gt;</code> will invoke the indexer defined by</p> <pre><code>public ItemType this[Int32 itemCode] { get; } </code></pre> <p>which is declared to return an <code>ItemType</code>. You haven't told us what <code>ItemType</code> is. We have no reason to know that an <code>ItemType</code> can be assigned to a variable of type <code>Database</code>.</p> <p>Indexers do not have to return the same type. However, it is not possible to overload solely on the basis of return type. That is, this is legal</p> <pre><code>class IndexerTest { public int this[int index] { get { return 0; } } public string this[double index] { get { return "Hello, success!"; } } } </code></pre> <p>This is not</p> <pre><code>class IndexerTest { public int this[int index] { get { return 0; } } public string this[int index] { get { return "Hello, fail!"; } } } </code></pre> <p>Responding to your edit:</p> <blockquote> <p>Edit: I just figured out that it's because of using an enumeration as an indexer which is internally an integer. Still, any way to use both an enumeration and an integer?</p> </blockquote> <p>If you want to invoke the indexer that accepts an enum, invoke it like so:</p> <pre><code>sampleDatabaseList[Environments.RMSEnvironment.SomeEnumValue]; </code></pre>
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    1. COItemType is declared as Database when DatabaseList inherits HierarchialItemList. In this case I am not trying to invoke the enum indexer, but the integer indexer. Visual Studio and the compiler errors that a DatabaseList is being returned.
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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