C# 7.0 introduced tuples but they could not be compared directly using == and !=. You had to compare each element individually or rely on Equals.

C# 7.3 adds support for the == and != operators on tuples, performing element-wise comparison with implicit conversions where applicable.

Code

Now

var point1 = (x: 1, y: 2);
var point2 = (x: 1, y: 2);

if (point1 == point2)
    Console.WriteLine("Same point");

Before

var point1 = (x: 1, y: 2);
var point2 = (x: 1, y: 2);

if (point1.x == point2.x && point1.y == point2.y)
    Console.WriteLine("Same point");

Notes

• Comparison is performed element-wise from left to right and short-circuits on the first mismatch
• Element names do not need to match — only the types and positions matter
• Implicit conversions are applied per-element (e.g., int to long)
• Nested tuples are compared recursively
• Nullable tuples are also supported

More information

• Specification
• Tuple types (C# reference)