New Understanding of C #

In the past, I learned that C # Only knows that it contains console programs and Windows Application Forms programs. I generally know that Windows Application Forms programs can be generated. . Today, we found that there are no fewer applications on the console than Windows application forms. I just didn't know it before. I was shocked by the fact that I knew the console program could be used as an interface application. I thought it was a little fun and dispelled my previous understanding. Although the program encountered great technical difficulties, but technical problems can be solved, cultivating interest in C # is the most important. If you are interested, you will have the motivation to learn. The technical aspects can be gradually accumulated. Just like a small program for this calculator, you can use the console to implement interface applications, large programs, such as bank programs, are also made on the console. At present, I still have little understanding of C #. I will learn how to accumulate it in the future. New features added in C #3.0

VaR and anonymous types:

(1) var:

Variables declared in the method range can have implicit type var. Implicit local variables force type variables, but are determined by the compiler.

VaR I = 10; it is automatically interpreted as int I = 10 during underlying compilation; similar to the VaR type in JavaScript.

(2) Anonymous type:

The anonymous type is used to encapsulate a set of read-only attributes into a single object without explicitly defining a type. The type name is generated by the compiler and cannot be

Source code-level usage. The property type is inferred by the compiler.

VaR v = new {amount = 108, message = "hello "};

V. Amount and V. message can be called directly.

The following is a simple program for playing the piano on the C # console:

Using system;
Using system. Collections. Generic;
Using system. LINQ;
Using system. text;

Namespace shengyin
{
Class Program
{
Static void main (string [] ARGs)
{

Console. backgroundcolor = consolecolor. Gray;
While (true)
{
Consolekeyinfo cki = console. readkey (true );
Int num = cki. keychar-48;
Write (Num );
// Console. writeline (cki. keychar );

}
}
Static void write (INT Yb)
{

Switch (Yb)
{

Case 1:

Console. Beep (14*37,200 );
// Console. writeline (cki. keychar );
Break;
Case 2:

Console. Beep (16*37,200 );
Console. backgroundcolor = consolecolor. darkred;
// Console. writeline (cki. keychar );
Break;
Case 3:

Console. Beep (18*37,200 );
Console. backgroundcolor = consolecolor. White;
// Console. writeline (cki. keychar );
Break;
Case 4:

Console. Beep (19*37,200 );
Console. backgroundcolor = consolecolor. Yellow;
// Console. writeline (cki. keychar );
Break;
Case 5:

Console. Beep (21*37,200 );
Console. backgroundcolor = consolecolor. darkcyan;
// Console. writeline (cki. keychar );
Break;
Case 6:

Console. Beep (23*37,200 );
Console. backgroundcolor = consolecolor. darkgreen;
// Console. writeline (cki. keychar );
Break;
Case 7:

Console. Beep (25*37,200 );
Console. backgroundcolor = consolecolor. darkmagenta;
// Console. writeline (cki. keychar );
Break;
Case 8:

Console. Beep (28*37,200 );
Console. backgroundcolor = consolecolor. blue;
// Console. writeline (cki. keychar );
Break;
Default:
Break;
}
For (INT I = 0; I <Yb; I ++)
{
Console. Write ("");
}
/// Console. writeline (Yb );

}

}




}