การแปลงโดยนัยและโดยชัดแจ้ง

using System;

class Program
{
    static void Main()
    {
        int i = 10;
        double d = i;       // implicit
        int back = (int)d;   // explicit
        Console.WriteLine(d + ", " + back);
    }
}

using System;

class Program
{
    static void Main()
    {
        int i = 42;
        long l = i;      // widening, safe
        double d = i;    // widening, safe
        Console.WriteLine(l + ", " + d);
    }
}

using System;

class Program
{
    static void Main()
    {
        byte b = 200;
        int i = b;       // byte fits in int
        Console.WriteLine("byte " + b + " -> int " + i);
    }
}

using System;

class Program
{
    static void Main()
    {
        double d = 9.78;
        int i = (int)d;   // truncates toward zero -> 9
        Console.WriteLine(i);
    }
}

using System;

class Program
{
    static void Main()
    {
        double d = 7.99;
        Console.WriteLine("Cast: " + (int)d);
        Console.WriteLine("Round: " + (int)Math.Round(d));
    }
}

using System;

class Program
{
    static void Main()
    {
        int big = 300;
        byte wrapped = (byte)big;   // 300 wraps to 44
        Console.WriteLine("Wrapped: " + wrapped);

        try
        {
            byte safe = checked((byte)big);
            Console.WriteLine(safe);
        }
        catch (OverflowException)
        {
            Console.WriteLine("checked caught overflow");
        }
    }
}

using System;

class Program
{
    static void Main()
    {
        long big = 9007199254740993L;
        double approx = big;   // implicit, may lose precision
        Console.WriteLine("long: " + big);
        Console.WriteLine("double: " + approx.ToString("F0"));
    }
}

using System;

class Program
{
    static void Main()
    {
        char c = 'A';
        int code = c;          // implicit -> 65
        char next = (char)(code + 1);   // explicit -> B
        Console.WriteLine(code + " -> " + next);
    }
}

using System;

class Program
{
    static void Main()
    {
        int a = 7;
        double b = 2;
        double result = a / b;   // a promoted to double -> 3.5
        Console.WriteLine(result);
    }
}

using System;

class Program
{
    static void Main()
    {
        int a = 7, b = 2;
        Console.WriteLine("int / int: " + (a / b));
        Console.WriteLine("with cast: " + ((double)a / b));
    }
}

using System;

class Program
{
    static void Main()
    {
        int total = 17, count = 5;
        double average = (double)total / count;   // cast to avoid integer division
        int rounded = (int)Math.Round(average);
        Console.WriteLine("avg=" + average + ", rounded=" + rounded);
    }
}

using System;

class Program
{
    static void Main()
    {
        double d = 3.9;
        int i = (int)d;     // explicit, truncates to 3
        long l = i;          // implicit widening
        Console.WriteLine(i + ", " + l);
    }
}