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:


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)


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
Next v
End Sub

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About The Author

Suprotim Agarwal
Suprotim Agarwal, ASP.NET Architecture MVP (Microsoft Most Valuable Professional) 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 is the Editor of a Developer Magazine called DNC Magazine. He has also written two EBooks 51 Recipes using jQuery with ASP.NET Controls. and The Absolutely Awesome jQuery CookBook

Follow him on twitter @suprotimagarwal

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