Question

I have created a dynamic method to create an instance of different type, but not sure why it is giving above mentioned error at compile time, also do I have to again cast the return value to the specified type?

 internal static T GetInstance<T>()
    {
        dynamic obj = Activator.CreateInstance(typeof(T));
        return obj;
    }

    private Foo f = GetInstance<Foo>();

Answer 1

Why don’t you just use what MSDN recommends, which is the following:

internal static T GetInstance<T>() where T:new()
{
    return new T();
}

http://msdn.microsoft.com/en-us/library/0hcyx2kd.aspx

EDIT:

Though, I don’t understand why you even want to have this method?

Instead of calling var x = GetInstance<Foo>();, you could just do var x = new Foo(); since Foo must have parameterless constructor if you want to call GetInstance<T>() with Foo as the type parameter ( or am I missing something? ).