function has multiple return values

classProgram {/// <summary>        ///solve a two -dimensional equation/// </summary>        /// <param name= "a" ></param>        /// <param name= "B" ></param>        /// <param name= "C" ></param>        /// <param name= "D" ></param>        /// <param name= "E" ></param>        /// <returns></returns>         Public intJiefangcheng (intAintBintC out DoubleX1, out Doublex2) {X1=0; X2=0; if(A = =0)            {                return 3; }            Else            {            intdel = b * B-4AC; if(Del >0) {x1= (-B + math.sqrt (DEL))/(2*a); X2= (-b-math.sqrt (del))/(2*a); return 2; }            Else if(Del = =0) {x1= (-B + math.sqrt (DEL))/(2*a); X2=X1; return 1; }            Else            {                return 0; }            }        }        Static voidMain (string[] args) {            //solve a two -dimensional equationConsole.Write ("Please enter a="); intA =int.            Parse (Console.ReadLine ()); Console.Write ("Please enter b="); intb =int.            Parse (Console.ReadLine ()); Console.Write ("Please enter c="); intc =int.            Parse (Console.ReadLine ()); Doublex1, x2; intJieguo =NewProgram (). Jiefangcheng (A,b,c, outX1, outx2); if(Jieguo = =0) {Console.WriteLine ("equation without real roots"); }            if(Jieguo = =1) {Console.WriteLine ("The equation has two equal real roots x1=x2="+x1); }            if(Jieguo = =2) {Console.WriteLine ("The equation has two equal real roots x1="+ x1 +"x2="+x2); }            if(Jieguo = =3) {Console.WriteLine ("not a unary two-time equation .");        } console.readline (); }    }

function has multiple return values