C#: ternary expressions inside interpolation are invalid

Question

I want to insert a ternary expression into a interpolation, like this:

var a = $"we have {true ? "a":"b"}";

Software used in compilation:

XBuild Engine Version 14.0
Mono, Version 5.2.0.215

And I used xbuild Cmc.sln(Cmc is my solution name). After that I got error (line 44 is the C# code given above):

Expr/Expression.cs(44,13): error CS8076: Missing close delimiter '}' for interpolated expression started with '{'.
Expr/Expression.cs(44,25): error CS1003: Syntax error, ':' expected
Expr/Expression.cs(44,25): error CS1733: Expected expression
Expr/Expression.cs(44,27): error CS1002: ; expected
Expr/Expression.cs(44,28): error CS1002: ; expected

Why do I get this? I think my code is valid.

Yeah, It's duplicate... But I searched `C# tenary` and I didn't get answer. So I opened a new question... Sorry. — ice1000, Sep 04 '17 at 18:05

score 1 · Accepted Answer · answered Sep 04 '17 at 18:02

1

Try:

$"we have {(true ? "a":"b")}";

answered Sep 04 '17 at 18:02

Titian Cernicova-Dragomir

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Wow thank you! But why? Do you know the reason why I got error without brackets? – ice1000 Sep 04 '17 at 18:04
The explanations in https://stackoverflow.com/questions/31844058/how-to-use-the-ternary-operator-inside-an-interpolated-string apply – Titian Cernicova-Dragomir Sep 04 '17 at 18:05
Yeah I've just viewed that... But anyway thanks. – ice1000 Sep 04 '17 at 18:06

C#: ternary expressions inside interpolation are invalid

1 Answers1