This post has been sitting in my drafts for months!  Because my friend Phil just posted his post on Lambda Expressions I'll simply link to his post and present the rest of this as supplemental examples.

// Delegates
// My Blog Engine is having trouble showing these so there may be some extra spaces
public delegate IntMathExpression (int x, int y);
public delegate IntMathExpressionSingle (int x);
public delegate
FloatMathExpression (float x, float y);

// Basic Lamda Expression
IntMathExpression a = (int x, int y) => x * y;
IntMathExpression b = (int alpha, int brovo) => alpha * brovo;
IntMathExpressionSingle c = (int x) => x * x;

// "such that" =>
// Parameters       => function body
// (param1, param2) => param1 + param2

// Lamda Expression using Type Inference
FloatMathExpression d = (x, y) => x + 3.14f * y;
// There is usually no need for custom delegates
Func<float, float, float> e = (x, y) => x * 100.0f + y; // Example using a lamda expression List<int> primes = new List<int>() { 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101 }; var p = primes.Where( prime => prime.ToString().EndsWith( "3" ) ); // Deferred Execution foreach (int i in p) { MessageBox.Show(i.ToString()); } // Query Expression Format var p2 = from prime in primes where prime.ToString().EndsWith("3") select prime; List<int> results = p2.ToList(); // Lamda Expressions mixed with Extension Methods List<string> str = new List<string>() { "The Lord of the Rings", "Star Wars, Eposode III", "Ratatouille" }; var p3 = from movie in str where movie.CountVowels() > 5 select movie; List<string> movieResults = p3.ToList();

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