How to Retrieve All Classes within a Specific Namespace in C#?

Retrieving Classes within a Namespace in C#

In C#, obtaining all classes within a specific namespace requires an indirect approach. To accomplish this:

1. Enumerate Assembly Types:

   • Retrieve all types within the assembly under scrutiny.

2. Filter by Namespace:

   • Verify the namespace of each type, retaining only those within the target namespace.

The following code snippet demonstrates this process:

private Type[] GetTypesInNamespace(Assembly assembly, string nameSpace)
{
    return 
      assembly.GetTypes()
              .Where(t => String.Equals(t.Namespace, nameSpace, StringComparison.Ordinal))
              .ToArray();
}

Example usage:

Assembly executingAssembly = Assembly.GetExecutingAssembly();
Type[] typelist = GetTypesInNamespace(executingAssembly, "MyNamespace");
for (int i = 0; i < typelist.Length; i++)
{
    Console.WriteLine(typelist[i].Name);
}

For .NET versions prior to 2.0, where Assembly.GetExecutingAssembly() is unavailable:

Assembly myAssembly = typeof(<Namespace>.<someClass>).GetTypeInfo().Assembly;
Type[] typelist = GetTypesInNamespace(myAssembly, "<Namespace>");
for (int i = 0; i < typelist.Length; i++)
{
    Console.WriteLine(typelist[i].Name);
}

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