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The Null coalescing operator is used with the nullable value types and reference types. It is a binary operator that simplifies checking for null values. If the value of the first operand is null, then the operator returns the value of second operand, otherwise it returns the value of the first operand. Example: x ??…
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C# provides a special data types, the nullable types, to which you can assign normal range of values as well as null values. [amazon_link asins=’B0719KCBZT,B0779CNVM8,B01CZWN0TI,B011V135LM,B0072T3X38,B078NRPJT6,B01FFQ1FS4,B00XHVQZNA,B011V108H6|B000BJVUS6,B01HEZ5H6K,B0199NOWM0,B00SNH9TKO,B01I9EFN1Y,B00EEV2QVW,B0107BYPLG,B005ANYMG0′ template=’ProductGrid’ store=’desibanjara22-21|desibanjaraco-21′ marketplace=’IN|UK’ link_id=’8afacfe7-94e3-11e8-8441-67501bd4f6a0′]
The purpose of an access specifier is to define the scope and visibility of a class member. C# provides five access specifiers: public, private , protected , internal and protected internal. Public access specifier allows a class to expose its member variables and member functions to other functions and objects. Any public member can be accessed from…
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Encapsulation is implemented by using access specifiers.
“as” operator casts without raising an exception if the cast fails. Example: Object message = new StringReader (“desibanjara”); StringReader newMessage = message as StringReader; [amazon_link asins=’B019MQLUZG,B079R1JS6K,B079R17XY2,B019MQONW8,B076H5S8S6,B077L4X3PN,B07B6DM75J,B01N3BN5E8,B07B4RZNG2|B00UNEHS44,B01CQOL3F8,B00T7YNWH8,B00T7YOXQC,B01N6BBAK9,B01HE5NDHA,B00SX8GSGG,B01AWLBCIK,B01N0AKAYE’ template=’ProductGrid’ store=’desibanjara22-21|desibanjaraco-21′ marketplace=’IN|UK’ link_id=’287ddac1-9493-11e8-a97d-331c2e92ac11′]
“is” operator determines whether an object is of certain type. Ex- If (David is Employee) // checks if David is an object of the Employee class. [amazon_link asins=’007070368X,8120352068,9352136640,8120349172,B015KHN65I,B075GTLVJ2,B06X3WF5FJ|1491988533,1491987650,B016Z18MLG,B000BJVUS6,B00DUQH1IK,B01HLBUXR0,B00SNH9TKO,B01HEZ5H6K,B0107BYPLG,B005ANYMG0′ template=’ProductGrid’ store=’desibanjara22-21|desibanjaraco-21′ marketplace=’IN|UK’ link_id=’7cb2d21b-9492-11e8-b23a-8b26c4ccd908′]
typeof() typeof keyword takes the Type itself as an argument and returns the underline Type of the argument. System.Type t1= typeof(Event); // Event is a Type GetType() GetType() will return the given variable base data type. It can only be invoked on the instance of the type. Event event= new Event(); System.Type t2= event.GetType(); // event…
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Dynamic types are similar to object types except that type checking for object type variables takes place at compile time, whereas for the dynamic variables type checking take place at run time. [amazon_link asins=’9351190900,1787287041,9386873583,9351343189,8120349172,007070368X,8120352068,9352136640,B016Z18MLG|1840787198,B016Z18MLG,1491988533,1491987650,1119428114,1484230175,1119449278,1119458684,0985580135′ template=’ProductGrid’ store=’desibanjara22-21|desibanjaraco-21′ marketplace=’IN|UK’ link_id=’23be5044-948b-11e8-b877-0dfd42244dbc’]
You can store any type of value in the dynamic type variable. Type checking for these types of variables takes place at runtime. Syntax: dynamic <variable_name> = value; Example: dynamic d = 20; [amazon_link asins=’9351190900,1787287041,9386873583,007070368X,8120349172,8120352068,9352136640|1840787198,1491987650,1491988533,0985580135,1509306986,1119458684,1119428114,1484230175′ template=’ProductGrid’ store=’desibanjara22-21|desibanjaraco-21′ marketplace=’IN|UK’ link_id=’ffa1faf1-93fb-11e8-a5ca-59726084cb0d’]
Boxing: is the process of converting from VALUE type to REFERENCE type. Ex: converting from int to object Unboxing: is the process of converting from REFERENCE type to VALUE type. Ex: converting from object to int [amazon_link asins=’9351190900,1787287041,007070368X,8120352068,9352136640,8120349172,9386873583,9351343189,B016Z18MLG|1840787198,B016Z18MLG,0985580135,1119458684,1484230175,1119428114,1491987650,1491988533,1119449278′ template=’ProductGrid’ store=’desibanjara22-21|desibanjaraco-21′ marketplace=’IN|UK’ link_id=’c651b5ad-93d9-11e8-b332-e523a69d9d98′]