// Math.cs public class Math { ///<summary> /// The Add method allows us to add two integers ///</summary> ///<returns>Result of the addition (int)</returns> ///<param name="x">First number to add</param> ///<param name="y">Second number to add</param> public int Add(int x, int y) { return x + y; } } //csc /t:library /doc:Math.xml Math.cs