Difference between struct and class in C #

1. struct does not allow display and declaration of its non-parameter constructor, which is different from the class
2. When struct cannot be declared, initialize its data member Value
3. When struct is passed as a parameter, you can consider using ref to optimize performance: because it is a value type (but pay attention to its value change)
4. struct does not inherit, But it inherits from system. valuetype ----> system. Object
5. struct can be viewed as a narrow class, which is suitable for small data members.
6. Understand as follows: Code : Class Class1
{
[Stathread]
Static   Void Main ( String [] ARGs)
{
Dimensions point =   New Dimensions ();
Console. writeline (point );

Dimensions point1;
Point1.length =   100 ;
Point1.width =   200 ;
Console. writeline (point1 );

Console. Readline ();
}
}

Public   Struct Dimensions
{
Public   Double Length;
Public   Double Width;

Public   Override   String Tostring ()
{
Return This. Length+ ":" + This. Width;
}
}