dotnet/roslyn

static readonly autoimplemented property

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#16,647 opened on Jan 20, 2017

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 (4 comments) (2 reactions) (0 assignees)C# (4,257 forks)batch import
Area-CompilersBugConcept-Diagnostic Clarityhelp wanted

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Description

Why does the following code given an error during compilation? public class A { }

public class B
{
    private static A AF { get; }

    public B()
    {
        AF = new A();
    }
}

C# 6.0, .NET 4.5, VS2015 Update 3

Expected Behavior: This code should not give a compiler error

Actual Behavior: error CS0200: Property or indexer 'B.AF' cannot be assigned to -- it is read only

Contributor guide

Research direction
Verify the C# language specification for static auto implemented properties. The error is expected because static properties cannot be assigned in instance constructors. Investigate whether the language design allows such assignment or if this is a known limitation.
Tech stack
csharp
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C#compiler concepts
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30