How do you call a method by its "name"?

What would be the way to call some method by name, like "Method1", if I've got an Object and it's Type?

I want to do something like this:

Object o;
Type t;

// At this point I know, that 'o' actually has
// 't' as it's type.

// And I know that 't' definitely has a public method 'Method1'.

// So, I want to do something like:

Reflection.CallMethodByName(o, "Method1");

Is this somehow possible? I do realize that this would be slow, it's inconvenient, but unfortunately I've got no other ways to implement this in my case.