C# Return multiple values from method

This can be achieved by returning a tuple.

A tuple is actually a collection of small values. Specifying a list of types in a method definition instructs it to return a tuple.

At the same time, the return statement in the method body must also specify a value list to be returned. Note that the types must correspond one to one.

（int,int） cal(...)
{
    
    
	int val1;
	int val2;
	...//计算val1和val2的值
	return (val1,val2)
}

When calling a method, provide a corresponding list of variables to hold the results.

int reVal1 , reVal2;
(reVal1,reVal2) = cal(...);

But vs2017 must add a package to support tuples.

Tools->NuGet Package Manager->Manage NuGet packages for solutions->Browse

SearchValueTuple _

Check the items and install them on a single machine

OK in the preview changes dialog