Calling generic method using reflection in .NET

I have a question. Is it possible to call generic method using reflection in .NET? I tried the following code

var service = new ServiceClass();
Type serviceType = service.GetType();
MethodInfo method = serviceType.GetMethod("Method1", new Type[]{});
method.MakeGenericMethod(typeof(SomeClass));
var result = method.Invoke(service, null);

But it throws the following exception "Late bound operations cannot be performed on types or methods for which ContainsGenericParameters is true."

You're not using the result of MakeGenericMethod - which doesn't change the method you call it on; it returns another object representing the constructed method. You should have something like:

method = method.MakeGenericMethod(typeof(SomeClass));
var result = method.Invoke(service, null);

(or use a different variable, of course).

You need to say

method = method.MakeGenericMethod(typeof(SomeClass));

at a minumum and preferably

var constructedMethod = method.MakeGenericMethod(typeof(SomeClass));
constructedMethod.Invoke(service, null);

as instances of MethodInfo are immutable.

This is the same concept as

string s = "Foo ";
s.Trim();
Console.WriteLine(s.Length);
string t = s.Trim();
Console.WriteLine(t.Length);

causing

4
3

to print on the console.

By the way, your error message

>"Late bound operations cannot be performed on types or methods for which ContainsGenericParameters is true."

if your clue that method still contains generic parameters.