The following table displays the C# equivalent of SQL Server datatypes −SQL Server data typeEquivalent C# data typevarbinaryByte[]binaryByte[]imageNonevarcharNonecharNonenvarcharString, Char[]ncharString, Char[]textNonentextNonerowversionByte[]bitBooleantinyintBytesmallintInt16intInt32bigintInt64smallmoneyDecimalmoneyDecimalnumericDecimaldecimalDecimalrealSinglefloatDoublesmalldatetimeDateTimedatetimeDateTimetableNonecursorNonetimestampNonexmlNone

AddRange method in lists adds an entire collection of elements. Let us see an example −Firstly, set a list in C# and add elements −List list = new List(); list.Add(100); list.Add(200); list.Add(300); list.Add(400);Now set an array of elements to be added to the list −// array of 4 elements int[] ... Read More

The reference data type in C# does not have the actual data stored in a variable, but they contain a reference to the variables.In C#, the following are the built-in reference types −Object TypeThe Object Type is the ultimate base class for all data types in C# Common Type System ... Read More

Mixed arrays are a combination of multi-dimension arrays and jagged arrays.Note − The mixed arrays type is obsolete now since .NET 4.0 update removed it.Let us see how you can declare a mixed array −var x = new object[] {89, 45, "jacob", 9.8}We can also set them as −var x ... Read More

HashtableA hash table is used when you need to access elements by using key, and you can identify a useful key value. Each item in the hash table has a key/value pair. The key is used to access the items in the collection.The members in a Hashtable are thread safe. ... Read More

The following are the escape characters in C# and the display column suggests how to use and print them in C# −Escape CharacterDescriptionPatternDisplay\aMatches a bell character, \u0007.\a"\u0007" in "Warning!" + '\u0007'\bIn a character class, matches a backspace, \u0008.[\b]{3, }"\b\b\b\b" in "\b\b\b\b"\tMatches a tab, \u0009.(\w+)\t"Name\t", "Addr\t" in "Name\tAddr\t"\rMatches a carriage return, ... Read More

The key-based I/O Collections in C# is what we call a SortedList −SortedListThe SortedList class represents a collection of key-and-value pairs that are sorted by the keys and are accessible by key and by index. This is how both of them gets added in a SortedList −s.Add("Sub1", "Physics"); s.Add("Sub2", "Chemistry"); ... Read More

An indexer in C# allows an object to be indexed such as an array. When an indexer for a class is defined, this class behaves similar to a virtual array. You can then access the instance of this class using the array access operator ([ ]).Indexers can be overloaded. Indexers ... Read More

The System.IO namespace has various classes useful for performing various operations with files, such as creating and deleting files, reading from or writing to a file, closing a file etc.The following are the I/O classes in C# −Sr.No.I/O Class & Description1BinaryReaderReads primitive data from a binary stream.2BinaryWriterWrites primitive data in ... Read More

Integer LiteralsAn integer literal can be a decimal, or hexadecimal constant. A prefix specifies the base or radix: 0x or 0X for hexadecimal, and there is no prefix id for decimal. Here are some of the examples of integer literals −10 // int 18u // unsigned intLet’s use the above ... Read More