How to Retrieve a List of All Classes within a C# Assembly?

How to List All Classes in an Assembly Using C#

In software development, it is often necessary to obtain a list of all classes defined within an assembly. This information can be valuable for understanding the structure of an application, identifying dependencies, or performing analysis.

One approach to retrieving a list of classes in an assembly is to use the Assembly.GetTypes() method. This method returns an array of Type objects that represent all the types defined in the assembly. Each Type object contains information about the class, including its name, namespace, and attributes.

The following code sample demonstrates how to list all classes in an assembly:

// Get the assembly containing the string type
Assembly mscorlib = typeof(string).Assembly;

// Iterate over all types in the assembly
foreach (Type type in mscorlib.GetTypes())
{
    // Check if the type is a class
    if (type.IsClass)
    {
        // Output the full name of the class
        Console.WriteLine(type.FullName);
    }
}

In this code sample, the typeof(string).Assembly expression retrieves the assembly that contains the string type. The Assembly.GetTypes() method is then used to obtain an array of all types defined in the assembly. The foreach loop iterates over each type in the array, checking if it is a class using the IsClass property. If the type is a class, its full name is output to the console.

By using the Assembly.GetTypes() method, you can easily enumerate all classes in an assembly. This information can be useful for various software development tasks, such as code analysis, dependency management, and debugging.

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