Error Prone .NET

ErrorProne.NET is a set of Roslyn-based analyzers that will help you to write correct code. The idea is similar to Google's error-prone but instead of Java, the analyzers are focusing on correctness (and, maybe, performance) of C# programs.

Installation

Add the following nuget package to you project: https://www.nuget.org/packages/ErrorProne.NET.CoreAnalyzers/

Rules

Rules

Async Analyzers

Id	Description
EPC14	ConfigureAwait(false) call is redundant
EPC15	ConfigureAwait(false) must be used
EPC16	Awaiting a result of a null-conditional expression will cause NullReferenceException
EPC17	Avoid async-void delegates
EPC18	A task instance is implicitly converted to a string
EPC26	Do not use tasks in using block
EPC27	Avoid async void methods
EPC31	Do not return null for Task-like types
EPC32	TaskCompletionSource should use RunContinuationsAsynchronously
EPC33	Do not use Thread.Sleep in async methods
EPC35	Do not block unnecessarily in async methods
EPC36	Do not use async delegates with Task.Factory.StartNew and TaskCreationOptions.LongRunning
EPC37	Do not validate arguments in async methods

Generic Bugs and Code Smells

Id	Description
EPC19	Observe and Dispose a 'CancellationTokenRegistration' to avoid memory leaks
EPC20	Avoid using default ToString implementation
EPC28	Do not use ExcludeFromCodeCoverage on partial classes
EPC29	ExcludeFromCodeCoverageAttribute should provide a message
EPC30	Method calls itself recursively
ERP041	EventSource class should be sealed
ERP042	EventSource implementation is not correct

Concurrency

Id	Description
ERP031	The API is not thread-safe

Error Handling Issues

Id	Description
EPC11	Suspicious equality implementation
EPC12	Suspicious exception handling: only the 'Message' property is observed in the catch block
EPC13	Suspiciously unobserved result
EPC34	Method return value marked with MustUseResultAttribute must be used
ERP021	Incorrect exception propagation
ERP022	Unobserved exception in a generic exception handler

Performance

Id	Description
EPC23	Avoid using Enumerable.Contains on HashSet
EPC24	A hash table "unfriendly" type is used as the key in a hash table
EPC25	Avoid using default Equals or HashCode implementation from structs