New changes with the out variables

Currently in C#, we need to first declare a variable before we pass it as an out parameter to a method. You can use a var while declaration if you initialize them in the same line, but when you don't want to initialize explicitly, you must declare them, specifying the full type:

    // predeclaration of 'out' variable was mandatory 
    int result; // or, var result = 0; 
    string value = "125"; 
 
    int.TryParse(value, out result); 
 
    Console.WriteLine("The result is: " + result); 

In C# 7.0, the out variables can be declared right at the point where they are passed as an out parameter to a method. You can now directly write int.TryParse(value, out int result); and get the value of the out parameter, to use it in the scope of the enclosing block:

    static void Main(string[] args) 
    { 
      string value = "125"; 
      int.TryParse(value, out int result); 
      Console.WriteLine("Result:  " + result); 
    } 

You can also use var instead of a...