C# in Depth

376INDEXDataTableExtensions 334–335DateTime 51, 82, 116, 125, 283non-nullability 113DateTimeRange 301DBNull 114, 334–335debugger 198, 321declarationof local variables 211, 213of partial methods 189declarative 14declarative programming 313decompilation 123, 225deduction event handlers 139defaultaccess modifier 193mode of parameter passing 54default constructor 191of Nullable 116, 120, 122Default property of EqualityComparer andComparer 83default value expressions 81default values 172, 210for type parameters 75See also default value expressionsDefaultIfEmpty. See Standard Query Operators,DefaultIfEmptydeferred execution 264, 267, 279, 290, 303,312, 337definite assignment 210output parameters 81variables 65degenerate query expressions 291delegate creation expression 143delegate instance 34–38, 284always referring to a method 35clumsiness of C# 1 54created by anonymous methods 146delegate keyword 146, 149for anonymous methods 10delegate type inference 227delegate types 34compatibility 143declaration 34, 37infererred by the compiler 139delegate, used for sorting 9delegates 354action 35, 140, 142as generic types 67as reference types 49C# 2 improvements 137–160C# invocation shorthand 36candidate signatures 35combining 38–40compiling from expression trees 240–241contravariance 35, 55, 138covariance 138creating instances 34creating one instance from another 143events 40–41examples of combination and removal 39exceptions 40function pointer 33immutability 38in C# 1 33–42in the framework 138, 145, 153, 160instances. See delegate instancesinvocation 34, 36–38, 138, 154Invoke method 36lambda expressions 232–238method group conversions 73specifying behavior 33summary of C# 1 features 41target 140target of action 36types. See delegate typesused in List 96used in the CCR 181using for specialization 355DELETE 319Dequeue 100derivation type constraints 77example with default values 81restrictions 78DescendantNodes 342DescendantNodesAndSelf 342Descendants 342DescendantsAndSelf 342descending ordering 294design layers 353design overhead 255design patterns 161, 181, 222, 274designers 186DataSets 335LINQ to SQL 316, 319Windows Forms 184developers 353development platform 26diagrams, LINQ to SQL 316dictionaries 219Dictionary 66, 99, 211Dictionary`2 93DictionaryEntry 67directories, LDAP 347disabling warnings 198disassembly 123discretion 208discussion groups 113Dispose 25, 92, 168, 171, 193Distinct. See Standard Query Operators, DistinctDLR. See Dynamic Language Runtime (DLR)Licensed to Rhona Hadida