c# - How do I make a command to add a variable and let the print command print the number or string of it -

class program {     static void main(string[] args)     {         console.backgroundcolor = consolecolor.blue;         console.clear();                 {             //print command             string print = console.readline();             if (print.tolowerinvariant().startswith("print: "))             {                 string p2 = print.substring(print.indexof(' ') + 1);                 console.writeline(p2);             }              string var = console.readline();             if (var.tolowerinvariant().startswith("var "))             {                 string v2 = var.substring(var.indexof(' ') + 1);             }         }         while (true);     } } 

i want how can create var typing var , set number or string , able print number or string

var keyword. solve problem renaming var variable:

class program {     static void main(string[] args)     {         console.backgroundcolor = consolecolor.blue;         console.clear();                 {             //print command             string print = console.readline();             if (print.tolowerinvariant().startswith("print: "))             {                 string p2 = print.substring(print.indexof(' ') + 1);                 console.writeline(p2);             }              string variable = console.readline();             if (variable.tolowerinvariant().startswith("var "))             {                 string v2 = variable.substring(variable.indexof(' ') + 1);             }         }         while (true);     } } 

edit: new requirements, code came it's without error handling:

using system; using system.collections.generic;  namespace variables {     class program     {         static void main(string[] args)         {             console.backgroundcolor = consolecolor.blue;             console.clear();             var dict = new dictionary<string, int>();                         {                 //print command                 string command = console.readline();                 if (command.tolowerinvariant().startswith("print: "))                 {                     string p2 = command.substring(command.indexof(' ') + 1);                     if (dict.containskey(p2)) console.writeline(dict[p2]);                     else console.writeline("variable {0} undefined!");                 }                 if (command.tolowerinvariant().startswith("var "))                 {                     string v2 = command.substring(command.indexof(' ') + 1);                     string[] parts = v2.split(new char[]{'='}, 2,  stringsplitoptions.removeemptyentries);                     parts[0] = parts[0].trim();                     parts[1] = parts[1].trim();                     dict.add(parts[0], int.parse(parts[1]));                 }             }             while (true);         }     } }