เมธอด 1

ข้อ1
CalRectangle(a,b);
CalSquare(c);
ข้อ 1.2
cal_rectangle(a,b)
cal_square(c);
ข้อ 1.3
static double CircleArea(double radius){
return Math.PI*radius*radius;
}
ข้อ 2
static void PrintLongerLine()
{
int i = 0;
while(i < 29)
{
Console.Write('*');
i++;
}
Console.WriteLine();
}

PrintLine();
PrintLongerLine();
PrintLine();
PrintLongerLine();

ข้อ 3
0000000000
********************
PrintCharLine('x',  10);
PrintCharLine('*',  20);
PrintCharLine('v',  30);
ข้อ 4 .1
h-(i+1)
i+1
ข้อ 4.2
using System;
class MainClass
{
    public static void PrintChar(char c, int len)
    {
        int i = 0;
        while(i < len)
        {
            Console.Write(c);
            i++;
        }
    }
    public static void Main(string[] args)
    {
        Console.Write("Enter height : ");
        int h = int.Parse(Console.ReadLine());
        int i = 0;
        while(i < h)
        {
            PrintChar('-', i);
            PrintChar('x', h-i);
            Console.WriteLine();
            i++;
        }
    }
}
ข้อ 5
int i = 1;
     while(i<dist)
     {
      Console.Write(' ');
      i++;
     }
     Console.WriteLine(c);
ข้อ 6.1

ข้อ 6.2

ข้อ 6.3

ข้อ 7