C# Change signature refactoring generates wrong syntax for named arguments in attribute constructor calls

[vsfeedback]

This issue has been moved from a ticket on Developer Community.

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[severity:It's more difficult to complete my work]
When using the "Change signature" refactoring in C# to add a new parameter to a constructor of an attribute class and requesting to inject a value using a named argument at existing call sites, the generated syntax for that argument at the call sites where the attribute is applied to a member is wrong: using the = symbol for assigning the argument value, where it should be using the : symbol.

Steps to reproduce:

1. Create a new C# Console App project (.NET Framework 4.8).
2. Replace the Program class in Program.cs with the following code:

	class Program
	{
		[Foo(a: 5)]
		static void Main(string[] args)
		{
		}

class FooAttribute : Attribute
		{
			public FooAttribute(int a)
			{
			}
		}
	}

3. Invoke the "Change signature" refactoring on the FooAttribute constructor.
4. Press the Add button.
5. Fill out the dialog as follows: Type name: int, Parameter name: b, Parameter kind: Required, Value to inject at all call sites: Value 2, "Use named argument" checked
6. Press the OK button.
7. Press the OK button of the change signature dialog.

Expected result at the call site:

		[Foo(a: 5, b: 2)]

Actual result at the call site:

		[Foo(a: 5, b = 2)]

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Original Comments

Feedback Bot on 1/31/2021, 07:39 PM:

We have directed your feedback to the appropriate engineering team for further evaluation. The team will review the feedback and notify you about the next steps.

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Original Solutions

(no solutions)