Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Economics & Finance
An enum (enumeration) in C# is used to store a set of named constants such as days of the week, months, seasons, or any fixed collection of related values. By default, enum constants start from 0 and increment by 1, but you can customize these values to match your specific requirements. Customizing enum values is useful when you need specific numeric representations, want to maintain compatibility with external systems, or need non-sequential numbering. Syntax Following is the syntax for declaring an enum with customized values − public enum EnumName { Value1 ... Read More
The DateTimeOffset.Compare() method in C# is used to compare two DateTimeOffset objects and indicates whether the first is earlier than the second, equal to the second, or later than the second. It returns an integer value that represents the relationship between the two dates. 0 − If val1 is later than val2 DateTimeOffset.Compare() Return Values < 0 val1 is earlier than val2 0 val1 equals val2 > 0 ... Read More
The Enumerable.Repeat method is part of the System.Linq namespace and creates a sequence that contains the same element repeated a specified number of times. This method is useful for initializing collections or generating test data with repeated values. Syntax Following is the syntax for the Enumerable.Repeat method − public static IEnumerable Repeat(TResult element, int count) Parameters element − The value to be repeated in the resulting sequence. count − The number of times to repeat the element. Return Value Returns an IEnumerable that contains the ... Read More
Comparing dates in C# is accomplished using the DateTime structure, which provides built-in comparison operators and methods. The DateTime class allows you to compare dates using standard operators like , ==, and specialized methods like Compare(). Syntax Following is the syntax for creating DateTime objects for comparison − DateTime date1 = new DateTime(year, month, day); DateTime date2 = new DateTime(year, month, day); Following are the comparison operators and methods available − // Using comparison operators if (date1 < date2) { } if (date1 > date2) { } if (date1 == date2) { ... Read More
The Tuple class represents a 3-tuple, also called a triple. A tuple is a data structure that contains a sequence of elements of different types, providing a convenient way to group related data together without creating a custom class. 3-tuples are commonly used for − Easier access to a data set with three related values. Easier manipulation of grouped data. To represent a single set of three related values. To return multiple values from a method. To pass multiple values to a method as a single parameter. ... Read More
A multiplication table displays the product of a number with a sequence of other numbers. In C#, you can generate and display multiplication tables using loops and formatted output. This is useful for educational applications, mathematical calculations, or creating reference tables. Syntax The basic structure for creating a multiplication table uses a loop with formatted output − while (counter
The union of two or more dictionaries combines all unique keys from the dictionaries. In C#, you can find the union using HashSet and the UnionWith() method to merge dictionary keys, or use LINQ methods to combine both keys and values. Syntax Following is the syntax for finding union of dictionary keys using HashSet − HashSet unionKeys = new HashSet(dict1.Keys); unionKeys.UnionWith(dict2.Keys); Following is the syntax for merging dictionary values using LINQ − var unionDict = dict1.Union(dict2).ToDictionary(kvp => kvp.Key, kvp => kvp.Value); Using HashSet for Key Union The most straightforward ... Read More
The Aggregate() method in C# applies an accumulator function over a sequence of elements. It processes each element in the collection and combines them into a single result using a specified function. This method is part of LINQ and provides a powerful way to perform custom aggregation operations. Syntax The Aggregate() method has three main overloads − // Simple aggregation without seed TSource Aggregate(Func func) // Aggregation with seed value TAccumulate Aggregate(TAccumulate seed, Func func) // Aggregation with seed and result selector TResult Aggregate(TAccumulate seed, Func func, Func resultSelector) Parameters ... Read More
The Tuple class represents a 4-tuple, which is called a quadruple. A tuple is a data structure that holds a sequence of elements of different types in a single object. 4-tuples are commonly used for − Easier access to a data set. Easier manipulation of a data set. To represent a single set of data. To return multiple values from a method. To pass multiple values to a method. 4-Tuple Structure Item1 Item2 Item3 ... Read More
The #undef directive in C# allows you to undefine a previously defined symbol, making it unavailable for use in conditional compilation directives like #if. This is useful for controlling which code sections are included during compilation. Syntax Following is the syntax for using the #undef directive − #undef SYMBOL Where SYMBOL is the identifier you want to undefine. For example − #undef DEBUG #undef TESTING Key Rules The #undef directive must appear at the top of the file, before any code or using statements. You ... Read More