Vb and c#
- 1. V B . N ET Comme nts C # ' Single line only REM Single line only ''' <summary>XML comments</summary> // Single line /* Multiple line */ /// <summary>XML comments on single line</summary> /** <summary>XML comments on multiple lines</summary> */ V B . N ET Da ta Type s C # Value Types Boolean Byte, SByte Char Short, UShort, Integer, UInteger, Long, ULong Single, Double Decimal Date (alias of System.DateTime) structures enumerations Reference Types Object String arrays delegates Initializing Dim correct As Boolean = True Dim b As Byte = &H2A 'hex or &O52 for octal Dim person As Object = Nothing Dim name As String = "Dwight" Dim grade As Char = "B"c Dim today As Date = #12/31/2010 12:15:00 PM# Dim amount As Decimal = 35.99@ Dim gpa As Single = 2.9! Dim pi As Double = 3.14159265 Dim lTotal As Long = 123456L Dim sTotal As Short = 123S Dim usTotal As UShort = 123US Dim uiTotal As UInteger = 123UI Dim ulTotal As ULong = 123UL Value Types bool byte, sbyte char short, ushort, int, uint, long, ulong float, double decimal DateTime (not a built-in C# type) structs enumerations Reference Types object string arrays delegates Initializing bool correct = true; byte b = 0x2A; // hex object person = null; string name = "Dwight"; char grade = 'B'; DateTime today = DateTime.Parse("12/31/2010 12:15:00 PM"); decimal amount = 35.99m; float gpa = 2.9f; double pi = 3.14159265; // or 3.14159265D long lTotal = 123456L; short sTotal = 123; ushort usTotal = 123; uint uiTotal = 123; // or 123U ulong ulTotal = 123; // or 123UL
- 2. V B . N ET Cons ta nts C # Const MAX_STUDENTS As Integer = 25 ' Can set to a const or var; may be initialized in a constructor ReadOnly MIN_DIAMETER As Single = 4.93 const int MAX_STUDENTS = 25; // Can set to a const or var; may be initialized in a constructor readonly float MIN_DIAMETER = 4.93f; V B . N ET Ope r a tor s C # Comparison = < > <= >= <> Arithmetic + - * / Mod (integer division) ^ (raise to a power) Assignment = += - = *= /= = ^= <<= >>= &= Bitwise And Or Xor Not << >> Logical AndAlso OrElse And Or Xor No t Note: AndAlso and OrElse perform short-circuit logical evaluations String Concatenation & Comparison == < > <= >= != Arithmetic + - * / % (mod) / (integer division if both operands are ints) Math.Pow(x, y) Assignment = += - = *= /= %= &= |= ^= <<= >>= ++ - - Bitwise & | ^ ~ << >> Logical && || & | ^ ! Note: && and || perform short-circuit logical evaluations String Concatenation +