C# (pronounced “See Sharp”) is a modern, object-oriented, and type-safe programming language. C# enables developers to build many types of secure and robust applications that run in .NET. C# has its roots in the C family of languages and will be immediately familiar to C, C++, Java, and JavaScript programmers.

  • foreach: loop
    For single-dimensional arrays, the foreach statement processes elements in increasing index order, starting with index 0 and ending with index Length - 1.

  • Random: create pseudo-random value

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    var rand = new Random();

    // Generate a random byte (integer) value.
    rand.Next(); 

    // Generate a random integer between 0 and 100.
    rand.Next(101); 

    // Generate a random integer from 50 to 100.
    rand.Next(50, 101);

  • Enumerable.SequenceEqual(): compare two sequences to be or not of equal length and have same element sequence