C get the class name or method name of the caller

 private static String? initClassName()
        {
    
            StackTrace trace = new StackTrace();
            var stringBuilder = new StringBuilder();
            // GetFrame() Get which class is called 
            // 1: first floor , That is, the current class 
            // 2: The second floor , That is, call the class 
            // 3: The third level , Multilayer call class 
            // n： And so on 
            Type? type = trace.GetFrame(2)?.GetMethod()?.DeclaringType;
            //  Get is called by the method in the class 
            string? method = trace.GetFrame(2)?.GetMethod()?.ToString();
            if (type != null)
            {
    
                stringBuilder.Append(" - ");
                stringBuilder.Append(type);
            }

            if (method != null)
            {
    
                stringBuilder.Append(" - ");
                stringBuilder.Append(method);
            }

            Console.WriteLine(" Get the class name ：" + stringBuilder);
            return stringBuilder.ToString();
        }