Note "generics in C-sharp"

Generics (parametrized types) in C-sharp are like templates in C++ only with somewhat limited capabilities (but, allegedly, increased safety). In particular, it is not possible to call arithmetic operators on generic types which makes C-sharp generics less useful for scientific computing.

Anyway, one can declare a generic class or a generic method using (just like in C++ and Java) angle brackets. For example, here is a (primitive) class implementing a generic list contaner,

public class genlist<T>{ /* "T" is the type parameter */
	private T[] data;
	public int size => data.Length;
	public T this[int i] => data[i];
	public genlist(){ data = new T[0]; } /* constructor */
	public void push(T item){ /* add item to the list */
		T[] newdata = new T[size+1]; /* inefective but saves memory */
		for(int i=0;i<size;i++)newdata[i]=data[i];
		newdata[size]=item;
		data=newdata; /* data is garbage collected */
	}
}

genlist<int> list = new genlist<int>();
list.push(1);
list.push(2);
list.push(3);
for(int i=0;i<list.size;i++)WriteLine(list[i]);