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7 kwi 2023 · The == (equality) and != (inequality) operators check if their operands are equal or not. Value types are equal when their contents are equal. Reference types are equal when the two variables refer to the same storage.
8 lip 2010 · 1 - Reference equals checks if two reference type variables (classes, not structs) are referred to the same memory adress. 2 - The virtual Equals () method checks if two objects are equivalent. Let us say that you have this class: class TestClass{ public int Property1{get;set} public int Property2{get;set} public override bool Equals(object obj)
4 paź 2013 · public override bool Equals(object obj) { Test other = obj as Test; if (other == null) return false; return (Value == other.Value) && (String1 == other.String1) && (String2 == other.String2); } GetHashCode is good for collections (like Dictionary<K, V>) to quickly determine approximate equality.
In some cases, you are testing for value equality, also known as equivalence, which means that the values that are contained by the two variables are equal. In other cases, you have to determine whether two variables refer to the same underlying object in memory.
Consider defining a record instead of a class when your type models data and should implement value equality. When you define a class or struct, you decide whether it makes sense to create a custom definition of value equality (or equivalence) for the type.
14 mar 2024 · Understanding and correctly implementing equality in C# can significantly affect the behavior of collections, uniqueness checks, and data integrity validations.
31 paź 2016 · It's common to compare two objects in C# for equality, such as for a save operation. Let's take a closer look at how we define what equal means.
