C# Console.OpenStandardError用法及代码示例

// C# program to illustrate the  
// OpenStandardError() Method 
using System; 
using System.IO; 
  
namespace GeeksforGeeks { 
  
class GFG { 
  
  
    // Main Method 
    static void Main(string[] args) 
    { 
        Console.WriteLine("Please Write GeeksForGeeks"); 
        string a; 
        a = Console.ReadLine(); 
  
        // checks for a string to be GeeksforGeeks 
        if (!a.Equals("GeeksForGeeks")) {  
  
            // Write error information to a file. 
            Console.SetError(new StreamWriter(@".\Errorfile.txt")); 
  
            Console.Error.WriteLine("The String is not GeeksForGeeks"); 
            Console.Error.Close(); 
  
            // Reacquire the standard error stream. 
            var standardError = new StreamWriter(Console.OpenStandardError()); 
            standardError.AutoFlush = true; 
  
            Console.SetError(standardError); 
  
            Console.Error.WriteLine("\nError information written"+ 
                                             " to Errorfile.txt"); 
        } 
    } 
} 
}