Csharp/CSharp Tutorial/Development/Console Read

How to read a character entered using the keyboard

class MainClass
{
  public static void Main()
  {
    System.Console.Write("Enter a character: ");
    char myChar = (char) System.Console.Read();
    System.Console.WriteLine("You entered " + myChar);
  }
}

Enter a character:     q
You entered

How to read a string entered using the keyboard

class MainClass
{
  public static void Main()
  {
    System.Console.Write("Enter a string: ");
    string myString = System.Console.ReadLine();
    System.Console.WriteLine("You entered " + myString);
  }
}

Enter a string: qwert
You entered qwert

Input from the console using ReadLine().

using System;  
  
class MainClass { 
  public static void Main() { 
    string str; 
 
    Console.WriteLine("Enter some characters."); 
    str = Console.ReadLine(); 
    Console.WriteLine("You entered: " + str); 
  } 
}

Enter some characters.
qwer
You entered: qwer

Read a character from the keyboard.

using System; 
 
class MainClass {   
  public static void Main() { 
    char ch; 
 
    Console.Write("Press a key followed by ENTER: "); 
 
    ch = (char) Console.Read(); // get a char 
    
    Console.WriteLine("Your key is: " + ch); 
  }   
}

Press a key followed by ENTER:
Your key is:

Read a string from the keyboard, using Console.In directly

using System;  
 
class MainClass { 
  public static void Main() { 
    string str; 
 
    Console.WriteLine("Enter some characters."); 
 
    str = Console.In.ReadLine(); // call TextReader"s ReadLine() method 
 
    Console.WriteLine("You entered: " + str); 
  } 
}

Enter some characters.
qwer
You entered: qwer

Reading Console Input

1. Console.In is an instance of TextReader.
2. Console.In defines two input methods: Read() and ReadLine().

To read a single character, use the Read() method:

static int Read()

Read input from console

using System;  
  
class MainClass {  
  public static void Main() {  
    string str; 
 
    Console.WriteLine("Enter password: "); 
    str = Console.ReadLine(); 
    Console.WriteLine(str); 
  } 
}

Enter password:
asdf
asdf

Read user selection from keyboard

using System;
class MainClass
{
  public static int Main(string[] args)
  {
    Console.WriteLine("1 = A \n 2 = B \n3 = C\n"); 
    Console.Write("Please select your implementation language:"); 
    // Get choice.
    string s = Console.ReadLine(); 
    int n = int.Parse(s);
  
    switch(n) 
    {
      case 1:
        Console.WriteLine("\nGood choice!  C# is all about managed code.");
        break;
  
      case 2:
        Console.WriteLine("\nLet me guess, your maintaining a legacy system?");
        break;
    
      case 3:
        Console.WriteLine("\nVB.NET:  It is not for just kids anymore...");
        break;
    
      default:
        Console.WriteLine("\nWell...good luck with that!");
        break;
    }
    return 0;
  }
}

1 = A
 2 = B
3 = C
Please select your implementation language:1
Good choice!  C# is all about managed code.