Chapter124:Functionwithmultiplereturn values

Section 124.1: “anonymous object” + “dynamic keyword”solution

Youcanreturnananonymousobjectfromyourfunction

publicstaticobjectFunctionWithUnknowReturnValues()

{

///anonymousobject

returnnew{a=1,b=2};

}

Andassigntheresulttoadynamicobjectandreadthevaluesinit.

///dynamicobject

dynamicx=FunctionWithUnknowReturnValues();

Console.WriteLine(x.a); Console.WriteLine(x.b);

Section124.2:Tuplesolution

YoucanreturnaninstanceofTupleclassfromyourfunctionwithtwotemplateparametersasTuple<string,MyClass>:

publicTuple<string,MyClass>FunctionWith2ReturnValues()

{

returnTuple.Create(“abc”,newMyClass());

}

Andreadthevalueslikebelow:

Console.WriteLine(x.Item1);

Console.WriteLine(x.Item2);

Section124.3:RefandOutParameters

TherefkeywordisusedtopassanArgumentasReference.outwilldothesameasrefbutitdoesnotrequirean assignedvaluebythecallerpriortocallingthefunction.

RefParameter:Ifyouwanttopassavariableasrefparameterthenyouneedtoinitializeitbeforeyoupassitas ref parameter to method.

OutParameter:Ifyouwanttopassavariableasoutparameteryoudon’tneedtoinitializeitbeforeyoupassitas out parameter to method.

staticvoidMain(string[]args)

{

inta=2;

intb=3;

intadd=0;

intmult=0;

AddOrMult(a,b,refadd,refmult);//AddOrMult(a,b,outadd,outmult);

Console.WriteLine(add);//5

Console.WriteLine(mult);//6

}

privatestaticvoidAddOrMult(inta,intb,refintadd,refintmult)//AddOrMult(inta,intb, outintadd,outintmult)

{

add=a+b;

mult=a*b;

}