Is in C# List something like vector.reserve(n) in C++

Question

When adding a lot of elements in System.Collections.Generic.List<T> it is running slow because when nums increases capacity it must copy all elements. In C++ this is fixed with vector.reserve(n). How can i do that in C#?

Answer 1

Use Capacity property:

list.Capacity = n;

or you can set initial capacity via the constructor:

var list = new List<int>(n);