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The StringCollection class in C# is not thread-safe by default. To achieve synchronized access in multi-threaded environments, you can use the SyncRoot property combined with a lock statement to ensure thread-safe operations. The SyncRoot property returns an object that can be used to synchronize access to the collection, preventing multiple threads from modifying or accessing the collection simultaneously. Syntax Following is the syntax for synchronized access to StringCollection − lock(stringCollection.SyncRoot) { // thread-safe operations on stringCollection } Why Synchronization is Needed In multi-threaded applications, multiple threads may try to ... Read More
In ASP.NET Web API, HTTP verbs define the actions that can be performed on resources. The primary HTTP verbs are GET, POST, PUT, PATCH, and DELETE, which correspond to read, create, update, and delete operations respectively. You can restrict access to specific action methods using HTTP verb attributes or by following naming conventions. ASP.NET Web API provides two main approaches to restrict method access: naming conventions and HTTP verb attributes. This ensures that your API endpoints respond only to intended HTTP methods, improving security and API design. HTTP Verbs and CRUD Operations HTTP Verb ... Read More
Once a Web API service is made public, different client applications start using our Web API services. As the business grows and requirements change, we may have to change the services as well, but the changes to the services should be done in a way that does not break any existing client applications. This is when Web API versioning helps. We keep the existing services as is, so we are not breaking the existing client applications, and develop a new version of the service that new client applications can start using. One of the most common approaches to ... Read More
In C#, a surrogate is a character that represents a Unicode code point outside the Basic Multilingual Plane (BMP). Surrogate characters are used to encode Unicode characters that require more than 16 bits, using a pair of 16-bit values called high surrogate and low surrogate. The Char.IsSurrogate() method checks whether a character at a specified position in a string is a surrogate character. Syntax Following is the syntax for checking surrogate characters − bool result = Char.IsSurrogate(string, index); bool result = Char.IsSurrogate(char); Parameters string − The string containing the character ... Read More
Querystring parameter versioning in ASP.NET Web API allows different API versions to be accessed using a query parameter like ?v=1 or ?v=2. By default, the DefaultHttpControllerSelector cannot route to version-specific controllers, so we need to create a custom controller selector. This approach enables you to maintain multiple API versions simultaneously while using descriptive controller names like StudentsV1Controller and StudentsV2Controller. How It Works The default controller selection process looks for a controller named exactly as specified in the route (e.g., StudentsController). When you have version-specific controllers like StudentsV1Controller, the default selector fails and returns a 404 error. ... Read More
The IsThreadPoolThread property in C# helps determine whether a thread belongs to the managed thread pool. This property returns true if the thread is from the thread pool, and false if it's a manually created thread. Understanding this distinction is important because thread pool threads are managed by the runtime and optimized for short-running tasks, while manually created threads give you more control but require more resources. Syntax Following is the syntax for checking if a thread belongs to the managed thread pool − bool isPoolThread = Thread.CurrentThread.IsThreadPoolThread; Manual Thread vs Thread Pool ... Read More
To get the hyperbolic arc-cosine of a floating-point value in C#, you use the MathF.Acosh() method for float values or Math.Acosh() method for double values. The hyperbolic arc-cosine function returns the value whose hyperbolic cosine is the specified number. Syntax Following is the syntax for the hyperbolic arc-cosine methods − // For float values public static float Acosh(float x) // For double values public static double Acosh(double x) Parameters x − A number representing a hyperbolic cosine, where x must be greater than or equal to 1. ... Read More
An exception filter in ASP.NET Web API provides a centralized way to handle unhandled exceptions that occur during controller method execution. When a controller method throws any unhandled exception (except HttpResponseException), the exception filter intercepts it and allows you to customize the HTTP response. Exception filters implement the System.Web.Http.Filters.IExceptionFilter interface. The simplest approach is to derive from the ExceptionFilterAttribute class and override the OnException method to define custom exception handling logic. Syntax Following is the basic syntax for creating a custom exception filter − public class CustomExceptionFilter : ExceptionFilterAttribute { public ... Read More
To convert the specified Windows file time to an equivalent local time in C#, you can use the DateTimeOffset.FromFileTime() method. This method converts a Windows file time (represented as a 64-bit integer) to a DateTimeOffset value that represents the equivalent local time. Windows file time is measured as the number of 100-nanosecond intervals that have elapsed since January 1, 1601 UTC. The FromFileTime method automatically adjusts the result to the local time zone of the system. Syntax Following is the syntax for converting Windows file time to local time − DateTimeOffset localTime = DateTimeOffset.FromFileTime(fileTime); ... Read More
To get the angle whose sine is a float value argument in C#, we use the MathF.Asin() method. This method returns the arcsine (inverse sine) of the specified number in radians. The input value must be between -1 and 1, otherwise the method returns NaN (Not a Number). Syntax Following is the syntax for MathF.Asin() method − public static float Asin(float x) Parameters x − A number representing a sine value. Must be between -1 and 1 inclusive. Return Value Returns the arcsine of the specified number in radians. ... Read More