Because equality as defined here is a simple value equality, not // reference identity, it is possible that two or more objects will produce the same // hash code. public int GetHashCode(FileInfo fi) { string s = $"{fi.Name}{fi.Length}"; return s.GetHashCode(); } } pub...
In the example above, variable value is of an anonymous type whose definition is equivalent to the following pseudo-C#: Copy internal class ??? { string _Name; int _Age; bool _CanCode; public string Name { get { return _Name; } set { _Name = value; } } public int Age{ get {...
value equality, not// reference identity, it is possible that two or more objects will produce the same// hash code.publicintGetHashCode(FileInfo fi){strings =$"{fi.Name}{fi.Length}";returns.GetHashCode(); } }publicstaticvoidCompareDirectories(){stringpathA ="""C:\Program F...
Order GetOrder(int orderID); DTO.Order CreateOrder(DTO.Order order); DTO.Order UpdateOrder(DTO.Order order); void DeleteOrder(DTO.Order order); } } By default, both LINQ to SQL and the Entity Framework will generate entities within the same namespace as the project. But by placing a...
Returns a count of records with True expression results. To return a count of all records in a query, use Count(True). LongCount Same as Count, but returns a Long instead of an Integer. Max Returns the maximum numeric expression from the set of records. Min Returns the minimum numeric ...
We override that so that if the Name is the same for each Employee, the hash code and the equals value will both correctly identify the instances as the same. There are also overloads for the set operators that take a custom comparer, which would also allow you to make this ...
Doesn’t help without other changes, because we’re making an array so all the values have to be computed regardless. Here’s what I came up with: publicstatic boolCountEquals<T>(thisIEnumerable<T> items, int count) => items.Take(count +1).Count() == count;public<T>(thisTitem, pa...
Assign a value from App.Config to a Attribute of a Property assigning a tooltip for a label Assigning and returning a value in the same statement Assigning each letter of the alphabet a numeric value ? Assigning the Scientific Notation(with E) to Double Variable Assigning values to XML Elem...
In Chapter 3, you wrote the same basic query over and over and over again. I hope you’ll agree that this was a great way to get exposure to the many different ways of writing queries against the Entity Data Model. There is a lot more to querying an EDM, however. You’ll need to...
ThisKey ="Id")]publicICollection<book> Books {get{return_books; }set{ _books.Assign(value); } } } To synchronize this relationship: Whenever a book is added to a category, set that book'sCategorytothis. Whenever a book is removed from a category, set that book'sCategorytonull. ...