Article Tags
Article Tags
How to cancel an async operation with a CancellationToken in C#?
cancellationToken.ThrowIfCancellationRequested() does not automatically interrupt the code, but only throws an exception; it must be actively called in the loop body, before calculation, or between asynchronous operations; the token of Task.Run only cancels scheduling and does not terminate delegate execution.
Feb 09, 2026 am 12:36 AM
How to create a background service in C# ASP.NET Core?
UseIHostedServiceforone-off/startuptasks;inheritBackgroundServiceforperiodicworklikepolling.RegisterwithAddHostedServicebeforeBuild(),avoidscopeddependenciesinconstructor,handleexceptionsandcancellationproperly.
Feb 09, 2026 am 12:35 AM
How to resolve common NullReferenceException issues in C#?
NullReferenceExceptionoccurswhenaccessingamemberonanullreference,buttheexceptionpointstotheaccesssite—notwherethenulloriginated;enablingnullablereferencetypescatches~70%ofsuchissuesatcompiletimeviawarningslikeCS8602.
Feb 08, 2026 am 12:53 AM
How to use C# to create a simple Azure Function?
You need to install .NET6 SDK, AzureFunctionsCoreToolsv4.x and a code editor; create an isolated mode HTTP function and test it locally; create a matching FunctionApp in Azure before deployment, and configure AppSettings instead of local.settings.json after publishing.
Feb 08, 2026 am 12:45 AM
How to manage user secrets in a C# ASP.NET Core application?
UseUserSecretsIdin.csprojanddotnetuser-secretsCLI—it’stheonlysafe,built-inwaytohandledev-timesecretswithoutcommittingthem;itlinkslocalsecrets.jsontotheprojectviaaGUID,loadsautomaticallyindevviaIConfiguration,butisintentionallyexcludedinproduction.
Feb 07, 2026 am 01:02 AM
How to efficiently parse a large JSON file in C#?
UseJsonSerializer.DeserializeAsyncwithStreamtoavoidmemoryoverload;File.ReadAllTextdoublesRAMusageviaUTF-8→UTF-16conversion.Preferstreaming,Utf8JsonReaderforpartial/irregulardata,orDeserializeAsyncEnumerableforlargerootarrays—alwayshandleJsonException
Feb 07, 2026 am 12:24 AM
How to interact with a RabbitMQ message queue from a C# application?
It is necessary to install the RabbitMQ.Client6.8.1 NuGet package, reuse IConnection in a singleton, create and release IModel channels on demand; enable publisherconfirms and persistent messages to ensure delivery reliability; disable autoAck on the consumer side, manually call BasicAck/Nack, and configure QoS to prevent message backlog.
Feb 06, 2026 am 01:46 AM
How to implement logging in C# with Serilog?
SerilogprovidesstructuredloggingwithqueryableJSON-likeeventsandeasycontextenrichment,unliketheunstructureddefaultILogger;setuprequiresreplacingtheloggingpipelineinProgram.cswithUseSerilog(),avoidingAddLogging(),andconfiguringsinks,enrichers,andconfig
Feb 06, 2026 am 01:41 AM
C# topological sorting implementation method How C# solves the problem of dependency sorting
The core basis for successful execution of topological sorting in C# is the absence of cycles in the graph. It is necessary to use Dictionary to model the directed graph, and the Kahn algorithm (based on in-degree) is recommended, which is implemented by maintaining a queue with an in-degree of 0, and finally checks whether the length of the result is equal to the total number of nodes to detect cycles.
Feb 05, 2026 am 08:36 AM
How to implement read-write separation in C# How to configure read-write separation in C# EF Core
EFCore6 does not natively support read-write separation. It needs to be implemented by naming and registering DbContext instances with different connection strings: the main library is used for write operations (ApplicationIntent=ReadWrite), and the slave library is used for read operations (ApplicationIntent=ReadOnly). The main library must be used uniformly in transactions.
Feb 05, 2026 am 08:33 AM
c# How to use Mutex to achieve cross-process synchronization
Direct newMutex() cannot be synchronized across processes, because unnamed Mutex is only valid between threads of the current process; cross-processes must use a globally unique named mutex, such as newMutex(false, "MyApp_GlobalLock"), and pay attention to the namespace (Local\ or Global\), permissions and exception handling.
Feb 05, 2026 am 08:30 AM
C# distributed transaction Saga mode method C# how to implement Saga mode to ensure eventual consistency
The Saga mode is suitable for eventual consistency scenarios across services/databases/message queues, such as order creation and refund processes; Orchestration coordinated implementation is recommended in C#, using libraries such as MassTransit to cooperate with state machines and persistence. The compensation needs to be idempotent and equipped with manual intervention.
Feb 05, 2026 am 08:27 AM
How to use C# code coverage tool How to use coverlet to generate test coverage report in C#
Coverlet is a .NET coverage collection tool. It does not generate HTML reports by itself, but only outputs data in JSON or CoberturaXML format. It needs to be converted into HTML with tools such as reportgenerator.
Feb 05, 2026 am 08:24 AM
C# object pooling method How to use Microsoft.Extensions.ObjectPool in C#
ObjectPool needs to configure the policy before using it. Create the pool through DefaultObjectPoolProvider, Get and Return the object; Customize PooledObjectPolicy to control creation, verification and cleanup; Note that MaximumRetained limits the pool size to prevent memory leaks; the pool is thread-safe, but the object must be thread-safe and cannot be returned repeatedly.
Feb 05, 2026 am 08:21 AM
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