Predefined Value Types and Reference Types ?

Question

Integer Types

sbyte               System.SByte
short                System.Int16
int                   System.Int32
long                 System.Int64
byte                System.Byte
ushort              System.UInt16
uint                  System.UInt32
ulong                System.UInt64

Floating Point Types

float                 System.Single
double              System.Double

The Decimal Type

decimal              System.Decimal

Boolean Type

bool                  System.Boolean

Character Type

cahr System.Char

Reference Types

object                System.Object
string                 System.String

Note : System.Object is the root type. All other types in the CTS are derived (including value types) from object.

Vulpes · Answer

In this example a reference to where the string literal Programming World is stored in the 'intern pool' is assigned to the string variable str1. A copy of this reference is then assigned to the variable str2 - so at that juncture they both refer to the same string literal. A reference to where the string literal Hello World is stored in the 'intern pool' is then assigned to the string variable str1 overwriting the existing reference. This doesn't affect what str2 refers to and so at that juncture the variables point to different string literals which is then reflected in what gets printed out. Although strings which are the only reference type which supports literals have some strange properties the above is in fact normal behavior for references types. If instead of string you'd have used a simple custom class the output would have been similar: class MyClass { public string s {get;set;} public MyClass(string s) { this.s = s; } } // ... MyClass mc1 = new MyClass(Programming World); MyClass mc2 = mc1; mc1 = new MyClass(Hello World); Console.WriteLine(mc1.s :  + mc1.s); Console.WriteLine(mc2.s :  + mc2.s); Output: mc1.s : Hello World mc2.s : Programming World

mursaleen fayyaz · Answer

The string Type string str1 = Programming World; string str2 = str1; str1 = Hello World; Console.WriteLine(str1 :  + str1); Console.WriteLine(str2 :  + str2); Output: str1 : Programming World str2 : Hello World Guys Comment on the output and difference from the usual behavior of reference types.

Jignesh Trivedi · Answer

hi Thanks for sharing also refer below link to understand value type and reference type in depth http://msdn.microsoft.com/en-us/library/s1ax56ch.aspx http://msdn.microsoft.com/en-us/library/490f96s2.aspx hope this will help.

Vulpes · Answer

If you're asking whether that list of C# aliases for basic types in the .NET framework is complete then the answer is yes it is.