Console app arguments how arguments are passed to Main method

Question

This would be question from c  beginner   When I create console application I get Main method with parameter args as array string  I do not understand how this method is called by system and how args are passed to the Main method  Maybe someone could explain   Is Main method are overridden of some kind of console class   namespace ConsoleApplication1       class Program                   static void Main string   args

User · Answer

The runtime splits the arguments given at the console at each space   If you call  myApp exe arg1 arg2 arg3   The Main Method gets an array of   var args   new string     arg1   arg2   arg3

User · Answer

Command line arguments is one way to pass the arguments in   This msdn sample is worth checking out  The MSDN Page for command line arguments is also worth reading   From within visual studio you can set the command line arguments by Choosing the properties of your console application then selecting the Debug tab

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The main method of the runtime engine looks something like int main int argc  char  argv     where argc is a count of the number of arguments and argv is an array of pointers to each  The runtime engine converts this into a form that is more natural to c    Prior to that main method being called  everything is in assembly language  It has access to the command line arguments  because the operating system makes that available to every process that starts   but that assembly language needs to convert a single string of the full command line into multiple substrings  using whitespace to separate them  before it s ready to pass them into main

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All answers are awesome and explained everything very well   but I just want to point out different way for passing args to main method  in visual studio    right click on Project then choose Properties go to Debug tab then on the Start Options section provide the app with your args    like this image    and happy knowing secrets

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you can pass also by making function and then in this function you call main method and pass argument to main method  static int Main string   args                  foreach  string b in args              Console WriteLine b                  Console ReadKey            aa            return 0             public static void aa                 string   aaa   Adil             Console WriteLine Main aaa

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Every managed exe has a an entry point which can be seen when if you load your code to ILDASM  The Entry Point is specified in the CLR headed and would look something like this

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in visual studio you can also do like that to pass simply or avoiding from comandline argument   static void Main string   args                if  args    null                        Console WriteLine  args is null       Check for null array                   else                       args new string 2               args 0     welcome in               args 1     www overflow com               Console Write  args length is                 Console WriteLine args Length      Write array length             for  int i   0  i  lt  args Length  i       Loop through array                               string argument   args i                   Console Write  args index                     Console Write i      Write index                 Console Write   is                      Console Write argument      Write string                 Console WriteLine

User · Answer

How is main called    When you are using the console application template the code will be compiled requiring a method called Main in the startup object as Main is market as entry point to the application   By default no startup object is specified in the project propery settings and the Program class will be used by default  You can change this in the project property under the  Build  tab if you wish   Keep in mind that which ever object you assign to be the startup object must have a method named Main in it      How are args passed to main method   The accepted format is MyConsoleApp exe value01 value02 etc     The application assigns each value after each space into a separate element of the parameter array   Thus  MyConsoleApp exe value01 value02 will mean your args paramter has 2 elements    0     value01    1     value02    How you parse the input values and use them is up to you   Hope this helped   Additional Reading   Creating Console Applications  Visual C    Command-Line Arguments  C  Programming Guide

User · Answer

Read MSDN   it also contains a link to the args   short answer  no  the main does not get override  when visual studio  actually the compiler  builds your exe it must declare a starting point for the assmebly  that point is the main function    if you meant how to literary pass args then you can either run you re app from the command line with them  e g  appname exe param1 param2  or in the project setup  enter them  in the command line arguments in the Debug tab   in the main you will need to read those args for example   for  int i   0  i  lt  args Length  i          string flag   args GetValue i  ToString        if  flag     bla                  Bla

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The Main method is the Entry point of your application  If you checkout via ildasm then    method private hidebysig static void  Main string   args  cil managed      entrypoint   This is what helps in calling the method  The arguments are passed as say C  AppName arg1 arg2 arg3

[c#] Console app arguments, how arguments are passed to Main method

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