C# does not have global variables and the scope resolution operator used in C++ for global variables is related to namespaces. It is called global namespace alias.If you have a type that shares an identifier in a different namespace, then to identify them using the scope resolution operator.For example, to reference System.Console class, use the global namespace alias with the scope resolution operator −global::System.ConsoleLet us now see an example −Example Live Demousing myAlias = System.Collections; namespace Program {    class Demo {       static void Main() {          myAlias::Hashtable h = new myAlias::Hashtable();     ... Read More

You can store any type of value in the dynamic data type variable. Type checking for these types of variables takes place at run-time. C# 4.0 introduced the dynamic type that avoids compile time type checking.The following is the syntax for declaring a dynamic type −dynamic = value;Dynamic types are similar to object types except that type checking for object type variables takes place at compile time, whereas that for the dynamic type variables takes place at run time.Let us see an example −dynamic a = 25;To get the type of dynamic variable −Exampleusing System; namespace Demo { ... Read More

To define a custom method in C#, use the following syntax − (Parameter List) { Method Body }The following are the various elements of a method −Access Specifier − This determines the visibility of a variable or a method from another class.Return type − A method may return a value. The return type is the data type of the value the method returns. If the method is not returning any values, then the return type is void.Method name − Method name is a unique identifier and it is case sensitive. It cannot be same as any other identifier declared ... Read More

The sort a list in C#, use the Sort() method.Let us first create a list −List myList = new List();Now add elements −myList.Add("Audi"); myList.Add("BMW"); myList.Add("Chevrolet"); myList.Add("Hyundai");Use the Sort() method to sort the list −myList.Sort();The following is an example showing how to sort a list in C# −Example Live Demousing System; using System.Collections.Generic; class Demo {    static void Main() {       List myList = new List();       myList.Add("Audi");       myList.Add("BMW");       myList.Add("Chevrolet");       myList.Add("Hyundai");       myList.Sort();       foreach (string value in myList) { ... Read More

The maximum possible value of an integer is 2, 147, 483, 647.The following are the datatypes of C# with the maximum and minimum value −TypeRepresentsRangeDefault ValueboolBoolean valueTrue or FalseFalsebyte8-bit unsigned integer0 to 255char16-bit Unicode characterU +0000 to U +ffff'\0'decimal128-bit precise decimal values with 28-29 significant digits(-7.9 x 1028 to 7.9 x 1028) / 100to 280.0Mdouble64-bit double-precision floating point type(+/-)5.0 x 10-324 to (+/-)1.7 x 103080.0Dfloat32-bit single-precision floating point type-3.4 x 1038 to + 3.4 x 10380.0Fint32-bit signed integer type-2, 147, 483, 648 to 2, 147, 483, 6470long64-bit signed integer type-9, 223, 372, 036, 854, 775, 808 to 9, 223, 372, ... Read More

HashtableHashtable class represents a collection of key-and-value pairs that are organized based on the hash code of the key. It uses the key to access the elements in the collection.Some of the commonly used methods in Hashtable class are −Sr.No.Method & Description1public virtual void Add(object key, object value);Adds an element with the specified key and value into the Hashtable.2public virtual void Clear();Removes all elements from the Hashtable.3public virtual bool ContainsKey(object key);Determines whether the Hashtable contains a specific key.4public virtual bool ContainsValue(object value);Determines whether the Hashtable contains a specific value.The following is an example showing the usage of Hashtable class in ... Read More

The DateTime class in C# is used to represent date and time in C#.The following are some of the properties of DateTime in C# −Sr.NoProperty & Description1DateGets the Date component2DayGets the day of the month3HourGets the hour of the month4MinuteGets the minute of the date5MonthGets the month of the dateLet us see an example to compare date in C#.To compare dates in C#, you need to first set two dates to be compared using the DateTime object. We will use the DateTime class in C# −Date 1DateTime date1 = new DateTime(2018, 07, 20); Console.WriteLine("Date 1 : {0}", date1);Date 2DateTime date2 ... Read More

The Main method states what the class does when executed and instantiates other objects and variables.A main method is static since it is available to run when the C# program starts. It is the entry point of the program and runs without even creating an instance of the class.The following shows how to add a Main() method with static −Example Live Demousing System; namespace Demo {    class HelloWorld {       static void Main(string[] args) {          Console.WriteLine("Bingo!");          Console.ReadKey();       }    } }OutputBingo!As you can see in ... Read More

To declare an array in C#, you can use the following syntax −datatype[ ] Name_of_array;Here, datatype is used to specify the type of elements in the array.[ ] specifies the size of the array.Name_of_array specifies the name of the array.The following is an example −double[ ] balance;Let us see an example in which an array is declared and values are added to it −Example Live Demousing System; namespace ArrayApplication {    class MyArray {       static void Main(string[] args) {          int [ ] n = new int[10]; /* n is an array of 10 ... Read More

Comma operator in C# can be used as a separator in method argument list. You can also use it is an operator in a for statement.The following is an example showing using a comma operator in a for statement for initialization −for (int i = begin, j = 1; i