corak is; corak hubungan & logik (peniruan C# 6)

using System;

public class Program
{
  static string Describe(object x)
  {
    if (x is int)
    {
      int i = (int)x; // bind
      return "int: " + i;
    }
    if (x is string)
    {
      string s = (string)x; // bind
      return "string(len=" + (s == null ? 0 : s.Length) + ")";
    }
    return "other";
  }

  public static void Main(string[] args)
  {
    Console.WriteLine(Describe(5));
    Console.WriteLine(Describe("hi"));
    Console.WriteLine(Describe(3.14));
  }
}

using System;

public class Program
{
  static bool IsBetween(int x, int minInclusive, int maxExclusive)
  {
    return x >= minInclusive && x < maxExclusive;
  }

  public static void Main(string[] args)
  {
    int v1 = 10, v2 = -5, v3 = 100;
    Console.WriteLine(IsBetween(v1, 0, 100));  // True
    Console.WriteLine(IsBetween(v2, 0, 100));  // False
    Console.WriteLine(IsBetween(v3, 0, 100));  // False
  }
}

using System;

public class Program
{
  static bool IsEven(int n) { return n % 2 == 0; }
  static bool IsPositive(int n) { return n > 0; }

  static bool And(Func<int,bool> a, Func<int,bool> b) { return a(4) && b(4); } // example composition (demo)
  // For general composition:
  static Func<int,bool> AND(Func<int,bool> a, Func<int,bool> b)
  {
    return delegate(int n) { return a(n) && b(n); };
  }
  static Func<int,bool> OR(Func<int,bool> a, Func<int,bool> b)
  {
    return delegate(int n) { return a(n) || b(n); };
  }
  static Func<int,bool> NOT(Func<int,bool> a)
  {
    return delegate(int n) { return !a(n); };
  }

  public static void Main(string[] args)
  {
    Func<int,bool> evenAndPositive = AND(IsEven, IsPositive);
    Console.WriteLine(evenAndPositive(4));  // True
    Console.WriteLine(evenAndPositive(-2)); // False
    Console.WriteLine(NOT(IsEven)(3));      // True (3 is not even)
  }
}

using System;

public class Program
{
  static string Check(object x)
  {
    if (x is int)
    {
      int i = (int)x;          // bind
      if (i > 0) return "positive int";
      return "non-positive int";
    }
    return "not an int";
  }

  public static void Main(string[] args)
  {
    Console.WriteLine(Check(5));     // positive int
    Console.WriteLine(Check(-3));    // non-positive int
    Console.WriteLine(Check("hey")); // not an int
  }
}