Coversion c++ to c#

Hi, I am trying to convert a code from c++ to c# for oculus in unity.
How i can convert the following method
1.vector<int>v (10,42), a; 
copy(v.begin(), v.end(), std::back_inserter(a));

how i can i use this copy in c#. in c# i m using List<int>v instead of vector.
2. how i can use Matrix4f which i used in c++ project that used ovr_math.h
any iDea??