How many elements a tuple can hold?

A tuple can hold up from 1 to 8 elements. In the case of more than 8 elements, then the 8th element can be defined as another tuple. Tuples can be specified as parameter or return type of a method.

In .NET, a tuple can hold up to 8 elements in a tuple.

In C#, tuples are immutable collections of heterogeneous elements. Prior to C# 7.0, tuples were limited to holding at most 8 elements. However, starting from C# 7.0, the ValueTuple type allows tuples with more than 8 elements, although it’s less commonly used due to its verbosity.

So, for a .NET interview question, you can say that a tuple can hold up to 8 elements natively, but it’s possible to have tuples with more elements using ValueTuple in newer versions of C#.