morgankenyon

LinkedList<int> extension = null;
extension.AddFirst(1);
Console.WriteLine("No Null Pointer Exception");

morgankenyon

LinkedListExtension extension = null;
extension.AddFirst(1);
Console.WriteLine("No Null Pointer Exception");

morgankenyon

StaticClass.Method(obj1, obj2);

morgankenyon

obj1.Method(obj2)

morgankenyon

//Crazify String
public static string Crazify(this string word)
{
    //do crazy things to string
}

string word = "Normal String";
word.Crazify();

//Insanify Int

morgankenyon

//copied from c# standard library
public static IEnumerable<TResult> Select<TSource, TResult>(this IEnumerable<TSource> source, Func<TSource, TResult> selector);
public static IEnumerable<TResult> Select<TSource, TResult>(this IEnumerable<TSource> source, Func<TSource, int, TResult> selector);

morgankenyon

string uncapitalizedSenence = "this is a sentence";
string capitalizedSentence = uncapitalizedSenence.Capitalize();
//Build Error Message: 'string' does not contain a definition for 'Capitalize' 
//and no accessible extension method 'Capitalize' accepting a first argument 
//of type 'string' could be found (are you missing a using directive or an 
//assembly reference?)

morgankenyon

public class Program
{
    public static void Main(string[] args)
    {
        string uncapitalizedSentence = "this is a sentence";
        string capitalizedSentence2 = StringHelper.Capitalize(uncapitalizedSentence);
    }
}

public static class StringHelper

morgankenyon

public class Program
{
    public static void Main(string[] args)
    {
        string uncapitalizedSentence = "this is a sentence";
        //no more build error!!!!
        string capitalizedSentence = uncapitalizedSentence.Capitalize();         
    }
}

morgankenyon

public static TSource First<TSource>(this IEnumerable<TSource> source);
public static int? Min(this IEnumerable<int?> source);
public static float? Max(this IEnumerable<float?> source);
public static IEnumerable<TSource> Where<TSource>(this IEnumerable<TSource> source, Func<TSource, bool> predicate);