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c#c#-7.2valuetuple

Check if value tuple is default

How to check if a System.ValueTuple is default? Rough example:

(string foo, string bar) MyMethod() => default;

// Later
var result = MyMethod();
if (result is default){ } // doesnt work

I can return a default value in MyMethod using default syntax of C# 7.2. I cannot check for default case back? These are what I tried:

result is default
result == default
result is default(string, string)
result == default(string, string)
Solution

  • If you really want to keep it returning default, you could use

    result.Equals(default)

    the built-in Equals method of a ValueTuple should work.

    As of C# 7.3 value tuples now also support comparisons via == and != fully, Meaning you can now also do

    result == default and it should work the same.