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The alternative for Visual Studio IDE to run C# programs −SharpDevelopIt is an open source IDE to run C# programs but works only Microsoft Windows. SharpDevelop was developed as an alternative to Visual Studio. It is written in C#. Supports Git, SVN, NuGet, LINQPadIt is a utility that allows you to run C# programs without having an IDE. Some of the features in LINQ Pa d is paid like autocomplete and allows the user to access it only after the payment.MonodevelopIt is an open source IDE that allows you to run C# on multiple platforms i.e. Windows, Linux, and MacOS. ... Read More
In a Dictionary collection, store any data type. Dictionary is a collection of keys and values in C#. Dictionary is included in the System.Collection.Generics namespace.Let us now see the best way to iterate over a Dictionary in C# −Firstly, let us create a dictionary −var d = new Dictionary(5);Now add the key and value −// add key and value d.Add("car", 25); d.Add("bus", 28); d.Add("motorbike", 17);Use orderby to order by values −var val = from ele in d orderby ele.Value ascending select ele;We have set ascending above to sort the dictionary in ascending order. You can also use descending.Display the values ... Read More
On Windows, the best IDE to run C# programs is Visual Studio. On Linux, the best IDE can be considered as Monodevelop. It is an open source IDE that allows you to run C# on multiple platforms i.e. Windows, Linux and MacOS. Monodevelop is also known as Xamarin Studio. It has a C# compiler to run C# programs.Monodevelop has the following features −Multi-platform IDESupports Linux, Windows and macOS.Supports multiple languagesMonoDevelop supports multiple languages such as C#, F#, Visual Basic .NET, etc.Integrated DebuggerIt comes with an integrated debugger for debugging Mono and native applications.Code CompletionCode completion support for C#, code templates, ... Read More
Thread pool in C# is a collection of threads. It is used to perform tasks in the background. When a thread completes a task, it is sent to the queue wherein all the waiting threads are present. This is done so that it can be reused.Let us see how to create a thread pool.Firstly, use the following namespace −using System.Threading;Now, call the threadpool class, using the threadpool object. Call the method QueueUserWorkItem −ThreadPool.QueueUserWorkItem(new WaitCallback(Run)); Iterate this in a loop and compare it with a normal Thread object.
Increment OperatorsTo increment a value in C#, you can use the increment operators i.e. Pre-Increment and Post-Increment Operators.The following is an example −Exampleusing System; class Demo { static void Main() { int a = 250; Console.WriteLine(a); a++; Console.WriteLine(a); ++a; Console.WriteLine(a); int b = 0; b = a++; Console.WriteLine(b); Console.WriteLine(a); b = ++a; Console.WriteLine(b); Console.WriteLine(a); ... Read More
A delegate that holds a reference to more than one method is called multicasting delegate.Let us see an example −Exampleusing System; delegate void myDelegate(int val1, int val2); public class Demo { public static void CalAdd(int val1, int val2) { Console.WriteLine("{0} + {1} = {2}", val1, val2, val1 + val2); } public static void CalSub(int val1, int val2) { Console.WriteLine("{0} - {1} = {2}", val1, val2, val1 - val2); } } public class Program { static void Main() { myDelegate d = new myDelegate(Demo.CalAdd); ... Read More
The System.SystemException class is the base class for all predefined system exception. Some of the exception classes derived from the System.Exception class are the System.ApplicationException and System.SystemException classes.The System.ApplicationException class supports exceptions generated by application programs. Hence the exceptions defined by the programmers should derive from this class.The following are the exceptions under the base class System.SystemException −Sr.No.Exception Class & Description1System.IO.IOExceptionHandles I/O errors.2System.IndexOutOfRangeExceptionHandles errors generated when a method refers to an array index out of range.3System.ArrayTypeMismatchExceptionHandles errors generated when type is mismatched with the array type.4System.NullReferenceExceptionHandles errors generated from referencing a null object.5System.DivideByZeroExceptionHandles errors generated from dividing a dividend with zero.6System.InvalidCastExceptionHandles errors ... Read More
C# exception is a response to an exceptional circumstance that arises while a program is running, such as an attempt to divide by zero.C# exception handling is performed using the following keywords −try − A try block identifies a block of code for which particular exceptions is activated. It is followed by one or more catch blocks.catch − A program catches an exception with an exception handler at the place in a program where you want to handle the problem. The catch keyword indicates the catching of an exception.finally − The finally block is used to execute a given set ... Read More
Substring is used to get the sub-parts of a string in C#. We have the substring() method for this purpose. Use the substring() method in C# to check each and every substring for unique characters. Loop it until the length of the string.If anyone the substring matches another, then it would mean that the string does not have unique characters.You can try to run the following code to determine if a string has all unique characters. The example shows the usage of Substring() method −Exampleusing System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; public class Demo { ... Read More
The stream is basically the sequence of bytes passing through the communication path. There are two main streams: the input stream and the output stream. The input stream is used for reading data from file (read operation) and the output stream is used for writing into the file (write operation).The FileStream class in the System.IO namespace helps in reading from, writing to and closing files. This class derives from the abstract class Stream.Create a FileStream object to create a new file or open an existing file. The following is the syntax −FileStream = new FileStream( , , , );Here, ... Read More