C # code Char, DateTime, escape character, pre-defined reference

Using System;
Using System.Collections.Generic;
Using System.Linq;
Using System.Text;

Namespace ConsoleApplication3
{
Class Program
{
static void Main (string[] args)
{
The following is Char
Char ch1 = ', ';
Console.WriteLine (Char.isseparator (CH1));
char CH2 = ';
Console.WriteLine (Char.iswhitespace (CH2));
Console.WriteLine (Ch1.compareto (' a '));
String str1;
STR1 = Char.convertfromutf32 (CH1);
Console.WriteLine (STR1);
Console.WriteLine (Char.equals (CH1, CH2));
Console.WriteLine (CH1. GetTypeCode ());
char CH3 = ' \a ';
Console.WriteLine (Char.iscontrol (CH3));
Console.WriteLine ();

The following are datetime
DateTime DT1 = new DateTime (2018, 01, 04, 11, 20, 00);
DateTime DT2 = new DateTime (2018, 07, 04, 14, 20, 00);
Console.WriteLine (DT1. date);//output current time accurate to date, not involving a few seconds
Console.WriteLine (DT1. DayOfWeek);//Output The current time is the first day of the week
Console.WriteLine (DT1. DayOfYear);//Output The current time is the first day of the year
Console.WriteLine (DT1. Hour);//Output the current time in pips
Console.WriteLine (System.DateTime.Now);//output current time, accurate to seconds
Console.WriteLine (System.DateTime.DaysInMonth (1998,2));//outputs how many days of the month are in the specified year
Console.WriteLine (DateTime.Now.Add (New TimeSpan (1008601, 0, 0)))//output specified time interval, time interval format is seconds
Console.WriteLine (DateTime.Parse ("2018/01/04 11:20:00"));//output is converted from a string to a time
Console.WriteLine (DT1. Tolongdatestring () + "" +dt1. Tolongtimestring ());//output DT1 time, accurate to the second
Console.WriteLine (DT1. ToShortDateString () + "" + dt1. Toshorttimestring ());//output DT1 time, accurate to minute
TimeSpan ts1 = dt1-dt2;//Set a time interval and output
Console.WriteLine (TS1);
Console.WriteLine (System.DateTime.Now + ts1);//output current time plus a specific time interval to get the time
Console.WriteLine (Ts1. Days+ "" +ts1. Hours+ "" +ts1. Totaldays);//interval take all day, the number of hours to 24 to take, in days units
Console.WriteLine ();

The following is an escape character
Console.WriteLine ("Iowa's" level "+" "+" Missouri "number" + "+" mk7\\406 mm naval gun ");
Console.WriteLine ("\ ' hello\ '");
Console.WriteLine ("' Hello '");
Console.WriteLine (@ "' Hello '");
Console.WriteLine ();

The following are reference types
String str2 = "Queen Elizabeth class battleship";
string str3 = str2;
Console.WriteLine ("STR2:" +str2+ "" + "STR3:" +STR3);
STR2 = "Scharnhorst class battleship";
Console.WriteLine ("STR2:" + str2 + "+" STR3: "+ STR3);

Console.read ();
}
}
}

C # code Char, DateTime, escape character, pre-defined reference