C# Online Compiler | .NET Fiddle

<no name> by Anonymous

using System;

public class Program
{
	public static void Main()
	{
		Console.WriteLine(string.IsNullOrWhiteSpace("\t")); //true
		Console.WriteLine(string.IsNullOrEmpty("\t")); //false
		Console.WriteLine(string.IsNullOrWhiteSpace(" ")); //true
		Console.WriteLine(string.IsNullOrEmpty(" ")); //false		
		Console.WriteLine(string.IsNullOrWhiteSpace("\n")); //true
		Console.WriteLine(string.IsNullOrEmpty("\n")); //false
	}
}

​x
 
using System;
​
public class Program
{
    public static void Main()
    {
        Console.WriteLine(string.IsNullOrWhiteSpace("\t")); //true
        Console.WriteLine(string.IsNullOrEmpty("\t")); //false
        Console.WriteLine(string.IsNullOrWhiteSpace(" ")); //true
        Console.WriteLine(string.IsNullOrEmpty(" ")); //false       
        Console.WriteLine(string.IsNullOrWhiteSpace("\n")); //true
        Console.WriteLine(string.IsNullOrEmpty("\n")); //false
    }
}

Hello World
Run-time exception (line 11): Value cannot be null.
Parameter name: source

Stack Trace:

[System.ArgumentNullException: Value cannot be null.
Parameter name: source]
at System.Linq.Enumerable.Where[TSource](IEnumerable`1 source, Func`2 predicate)
at Program.Main() :line 11

Last Run:	5:59:16 pm
Compile:	0.126s
Execute:	0s
Memory:	48kb
CPU:	0.016s

View IL Code