Invoke API Clear Screen

Using system;using system.collections.generic;using system.linq;using system.text;using System.Threading.Tasks; Using system.runtime.interopservices;namespace calculate{struct Stdhandleenum {public const int Std_input_h        Andle =-10;        public const INT Std_output_handle =-11;    public const INT Std_error_handle =-12;    };            Static class Consoleex {internal struct COORD {public short X;        public short Y;            } [StructLayout (layoutkind.sequential, Pack = 1)] internal struct Console_screen_buffer_info {            Public COORD Size;            Public COORD p1;            public short A1;            public short W1;            public short W2;            public short W3;            public short W4;        Public COORD M1;        } [DllImport ("kernel32.dll")] public static extern int GetStdHandle (int nstdhandle); [DllImport ("kernel32.dll")] public static extern bool GetcoNsolescreenbufferinfo (int hconsoleoutput, out console_screen_buffer_info lpconsolescreenbufferinfo); [DllImport ("kernel32.dll")] public static extern bool SetConsoleCursorPosition (int hconsoleoutput, COORD Dwcursorpo        Sition); [DllImport ("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)] public static extern bool FILLCONSOLEOUTPU        Tcharacter (int hconsoleoutput, short ccharacter, int. nlength, COORD Writecoord, out int lpnumberofcharswritten);            public static void Clear () {Console_screen_buffer_info csbi;            int hOut;            int charout;            COORD Home;            HOut = GetStdHandle (Stdhandleenum.std_output_handle);            Getconsolescreenbufferinfo (HOut, out CSBI);            home.x = 0;            home.y = 0; Fillconsoleoutputcharacter (HOut, (short) ", Csbi. size.x * Csbi.            Size.y, Home, out charout);        SetConsoleCursorPosition (HOut, Home); }    }}

Invoke API Clear Screen