Determine all Types that Implement an Interface

I recently saw an interesting discussion on a forum. The discussion was about finding all the types that implement a particular interface. Here’s a code that lists all the types implementing a particular interface:

C#

using System.Linq;

public static void Main(string[] args)
{
    var t = typeof(IYourInterfaceName);
    var assemblyTypes = AppDomain.CurrentDomain.GetAssemblies()
        .SelectMany(typ => typ.GetTypes())
        .Where(x => t.IsAssignableFrom(x));
    foreach (var v in assemblyTypes)
    {
        Console.WriteLine(v.FullName);
    }          
    Console.ReadLine();
}

VB.NET

Public Shared Sub Main(ByVal args() As String)
    Dim t = GetType(IYourInterfaceName)
    Dim assemblyTypes = AppDomain.CurrentDomain.GetAssemblies() _
    .SelectMany(Function(typ) typ.GetTypes()) _
    .Where(Function(x) t.IsAssignableFrom(x))
    For Each v In assemblyTypes
        Console.WriteLine(v.FullName)
    Next v
    Console.ReadLine()
End Sub

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About The Author

Suprotim Agarwal, ASP.NET Architecture MVP works as an Architect Consultant and provides consultancy on how to design and develop Web applications.

Suprotim is also the founder and primary contributor to DevCurry, DotNetCurry and SQLServerCurry. He has also written an EBook 51 Recipes using jQuery with ASP.NET Controls.

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