c# - Dynamic and Explicit Generic Interface Implementation

Question

I've learnt from here that dynamic variables cannot access methods on interfaces they explicitly implement. Is there an easy way to invoke the interface methods when I don't know the type parameter T at compile time?

interface I<T>
{
    void Method1(T t);
}

class C<T> : I<T>   
{   
    void I<T>.Method1(T t) 
    { 
        Console.WriteLine(t);
    }
}

static void DoMethod1<T>(I<T> i, T t)
{
    i.Method1(t);
}

void Main()
{
    I<int> i = new C<int>();
    dynamic x = i;
    DoMethod1(x, 1);              //This works
    ((I<int>)x).Method1(2);       //As does this
    x.Method1(3);                 //This does not
}      

I don't know the type parameter T, so (as far as I know) I can't cast my dynamic variable x. I have lots of methods in the interface, so don't really want to create corresponding DoXXX() pass through methods.

Edit: Note that I don't control and cannot change C or I.

Answer 1

您可以通过反射来做到这一点：

I<int> i = new C<int>();
dynamic x = i; // you dont have to use dynamic. object will work as well.
var methodInfo = x.GetType().GetInterfaces()[0].GetMethod("Method1");
methodInfo.Invoke(x, new object[] { 3 });