Asp.net C # gets the function of the current time in milliseconds

Asp.net C # obtains the function of the current time in milliseconds. The best method for the following date function applications should be the fifth one.

In asp tutorial. net c #, obtain the function of the current time in milliseconds. The best method for the following date function applications should be the fifth one.
/*
Method 1

Datetime. now. tostring ("yyyy-mm-dd hh: mm: ss: fff ")

Method 2

Environment. tickcount

Method 3

Datetime. now. millisecond;

Method 4

Console. writeline (datetime. now. ticks );

Method 5
 

Datetime d1 = new datetime. parse ("10:10:00 ");
Datetime d2 = new datetime (1970, 1, 1 );
Double d = d1.subtract (d2). totalmilliseconds ();