Compiler Error CS0027

Keyword 'this' is not available in the current context

The this keyword was found outside of a property, method, or constructor.

To fix this error, either modify the statement to eliminate use of the this keyword, and/or move part or all of the statement inside a property, method, or constructor.

The following example generates CS0027:

using System;  
using System.Collections.Generic;  
using System.Text;  
  
namespace ConsoleApplication3  
{  
    class MyClass  
    {  
  
        int err1 = this.Fun() + 1;  // CS0027
  
        public int Fun()  
        {  
            return 10;  
        }  
  
        public void Test()  
        {  
            // valid use of this  
            int err = this.Fun() + 1;  
            Console.WriteLine(err);  
        }  
  
        public static void Main()  
        {  
            MyClass c = new MyClass();  
            c.Test();  
        }  
    }  
}