Reflection - Getting the generic arguments from a System.Type instance

Question

If I have the following code:

MyType<int> anInstance = new MyType<int>(); Type type = anInstance.GetType(); 

How can I find out which type argument(s) "anInstance" was instantiated with, by looking at the type variable? Is it possible?

Answer 1

Use Type.GetGenericArguments. For example:

using System; using System.Collections.Generic;  public class Test {     static void Main()     {         var dict = new Dictionary<string, int>();          Type type = dict.GetType();         Console.WriteLine("Type arguments:");         foreach (Type arg in type.GetGenericArguments())         {             Console.WriteLine("  {0}", arg);         }     } } 

Output:

Type arguments:   System.String   System.Int32 

Answer 2

Use Type.GetGenericArguments(). For example:

using System; using System.Reflection;  namespace ConsoleApplication1 {   class Program {     static void Main(string[] args) {       MyType<int> anInstance = new MyType<int>();       Type type = anInstance.GetType();       foreach (Type t in type.GetGenericArguments())         Console.WriteLine(t.Name);       Console.ReadLine();     }   }   public class MyType<T> { } } 

Output: Int32