using System;
using System.Net.Http;
using System.Net.Http.Headers;

public class Example
{
    public static void Main(string[] args)
    {
        // Simulate a scenario where HttpLibParserException might occur.
        // This is a conceptual example as directly triggering this specific exception
        // with arbitrary malformed headers often depends on the internal implementation
        // of the HTTP client or specific header parsers.

        var request = new HttpRequestMessage(HttpMethod.Get, "http://example.com");

        // Intentionally malformed header value (e.g., invalid characters, missing parts)
        // The exact malformation that triggers HttpLibParserException can vary.
        // For demonstration, let's assume a malformed 'Content-Type'
        string malformedHeaderValue = "application/json; boundary="; // Incomplete boundary

        try
        {
            // Attempting to add a malformed header might trigger the exception
            // depending on the HttpClient's internal header parsing logic.
            // Note: Directly creating HttpRequestMessage and adding headers might not
            // always throw this specific exception directly during construction,
            // but rather during the actual sending of the request if validation occurs then.
            // For a more direct simulation, one might need to access internal parsing methods
            // if they were exposed, which is not typical.

            // A more illustrative (though perhaps not perfectly accurate to direct trigger)
            // way to show the *context* of the exception:
            var headers = new HttpHeaders(); // Or request.Headers
            // headers.Add("Malformed-Header", malformedHeaderValue); // This might work for some headers.

            // Let's simulate receiving malformed data that would be parsed.
            // This is highly conceptual.
            Console.WriteLine("Simulating header parsing...");
            // In a real scenario, this parsing happens internally.
            // For demonstration, imagine this line failed:
            // ParseHeaders(malformedString);

            // If the internal parsing fails due to malformed headers,
            // HttpLibParserException could be thrown.

            // For the sake of this example, we'll use a placeholder that represents
            // where the error *would* manifest if encountered.
            throw new HttpLibParserException("Failed to parse HTTP headers.", new FormatException("The header value is malformed."));

            Console.WriteLine("Header parsing successful (this line will not be reached in case of exception).");
        }
        catch (HttpLibParserException ex)
        {
            Console.ForegroundColor = ConsoleColor.Red;
            Console.WriteLine($"\nAn HttpLibParserException occurred:");
            Console.WriteLine($"  Message: {ex.Message}");
            Console.WriteLine($"  Inner Exception: {ex.InnerException?.Message}");
            Console.WriteLine($"  Stack Trace: {ex.StackTrace}");
            Console.ResetColor();
        }
        catch (Exception ex)
        {
            Console.ForegroundColor = ConsoleColor.Yellow;
            Console.WriteLine($"\nA general exception occurred: {ex.Message}");
            Console.ResetColor();
        }
    }
}

// Mock class for demonstration purposes, as HttpLibParserException is internal
// in some .NET versions or might not be directly instantiable outside its assembly.
// In a real .NET SDK, you would catch the actual exception.
namespace System.Net.Http.Headers
{
    public class HttpLibParserException : FormatException
    {
        public HttpLibParserException(string message) : base(message) { }
        public HttpLibParserException(string message, Exception innerException) : base(message, innerException) { }
        // Other constructors might exist
    }
}