what does tuple mean in c# code example

Example 1: what is tuple in f#

// Tuple of two integers.
( 4, 5 )

// Triple of strings.
( "one", "two", "three" )

// Tuple of unknown types.
( a, b )

// Tuple that has mixed types.
( "Absolute Classes", 1, 2.0 )

// Tuple of integer expressions.
( a * 4, b + 7)

Example 2: c# tuple

var tupleList = new List<Tuple<int, string, string, string>>();
 tupleList.Add(Tuple.Create(1, "Sefat Anam", "Dhaka Bangladesh", "0.1245345"));