10 Things You Maybe Didn’t Know About C# | Memory Fences

Here's a few code summaries:

1: You can create non-zero based arrays

static void Go() {

    string[] thingsThatHappenedInMyLife = (string[]) Array.CreateInstance(typeof(string), new[] { 24 }, new[] { 1990 });

 

    thingsThatHappenedInMyLife.SetValue("I was born", 1990);

    thingsThatHappenedInMyLife.SetValue("I dislocated my shoulder", 1996);

    thingsThatHappenedInMyLife.SetValue("I was allowed to buy alcohol (big mistake)", 2008);

    thingsThatHappenedInMyLife.SetValue("I started a programming blog", 2013);

 

    for (int i = thingsThatHappenedInMyLife.GetLowerBound(0); i <= thingsThatHappenedInMyLife.GetUpperBound(0); ++i) {

        string lifeEvent = (string)thingsThatHappenedInMyLife[i];

        if (lifeEvent == null) lifeEvent = "not much happened to me";

        Console.WriteLine("In " + i + ", " + lifeEvent);

    }

}

2: You can create unions in C# 

[StructLayout(LayoutKind.Explicit)]

public struct UnionTest {

    [FieldOffset(0)]

    public uint Value;

 

    [FieldOffset(0)]

    public readonly byte AsByte;

}

3: You can define extension methods with generic constraints on the extended type 

///

/// Returns the target object if it is not null; or throws a NullReferenceException if it is.

///

/// The target object's type.

/// The extended subject.

/// The message that will be passed to the generated exception. If null, then a default message will be used.

/// The object that NotNull was called on.

public static T NotNull(this T extended, string exceptionMessage = null)

    where T : class {

    if (extended == null) throw new NullReferenceException(exceptionMessage ?? "Supplied " + typeof(T).Name + " must not be null!");

    else return extended;

}

... and lots more ! Go read the blog !