How Can I Access All Classes Within a Namespace Using Reflection in C#?

Use C# reflection to access all classes in the namespace

In C#, obtaining all classes in a namespace through reflection requires careful consideration. Unlike Java, where classes only exist within a specified namespace, C# namespaces can span multiple assemblies.

To get a complete list of classes in a namespace, follow these steps:

1. Enumerating Assemblies: Gets a list of assemblies that reference the target namespace. This can be achieved using Assembly.GetExecutingAssembly().GetTypes().
2. Filter classes: Narrow down the types obtained from the assembly to only those types that are classes and match the required namespace. Use structures like where t.IsClass && t.Namespace == nspace to filter.

The following code effectively uses this approach:

<code class="language-csharp">string nspace = "...";

var q = from t in Assembly.GetExecutingAssembly().GetTypes()
        where t.IsClass && t.Namespace == nspace
        select t;

q.ToList().ForEach(t => Console.WriteLine(t.Name));</code>

This code iterates through all types in the assembly, selecting classes in the specified namespace. Then print the class name to the console. Note that this is limited to the currently executing assembly. To access classes in other assemblies, you need to modify your code to include references to those assemblies.

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