Object reference not set to an instance of an object

Question

Hi All,

 

Can anyone one help me to rectify the error for the blow code for String type.

If i pass string directly it is working but if i  mention string value1= Console.ReadLine(); not executing.

 

error:

Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object at Program.Main () [0x0000c] in :0 [ERROR] FATAL UNHANDLED EXCEPTION: System.NullReferenceException: Object reference not set to an instance of an object at Program.Main () [0x0000c] in :0  

 

C# code:

 

using System;

public class Program

{

public static void Main()

{

int sp = 0;

int ws = 0;

int di = 0;

string value1= Console.ReadLine();

foreach (char c in value1)

{

if (!char.IsLetterOrDigit(c))

{ sp++;

if(char.IsWhiteSpace(c))

{

sp--;

}

}

if (char.IsWhiteSpace(c))

{ ws++;

}

if (char.IsDigit(c))

{ di++;

}

}

Console.WriteLine("special "+sp);

Console.WriteLine("white "+ws);

Console.WriteLine("digit "+di);

}

}