PCL

namespace PortableClassLibrary1
{
    public interface test
    {
        void test();
    }
    public class Class1
    {
        test Test;
        public Class1(test Test)
        {
            this.Test = Test;
        }
        public Task<bool>  Call()
        {
            return Task.Factory.StartNew(() =>
            {
                try
                {
                    Test.test();
                    return true;
                }
                catch(Exception ex)
                {
                    return false;
                }
            });
 
        }
    }
}