C# language specificationįor more information, see the Assignment operators section of the C# language specification.įor more information about the ref assignment operator = ref, see the feature proposal note. However, if a user-defined type overloads a binary operator op, the op= operator, if it exists, is also implicitly overloaded. Hands can be difficult, and there are a lot of tutorials and references out there that use. For more information, see User-defined conversion operators.Ī user-defined type cannot explicitly overload a compound assignment operator. An updated, more well-crafted version can be found hereA reference I put together for me to use later. That way, the value of a user-defined type can be assigned to a variable, a property, or an indexer element of another type. However, a user-defined type can define an implicit conversion to another type. September 5, 1974: The California Angels sent a player to be named later to the St. Louis Cardinals to complete an earlier deal made on September 5, 1974. Operator overloadabilityĪ user-defined type cannot overload the assignment operator. October 15, 1974: the California Angels sent Rich Hand to the St. For more information, see the ? and ?= operators article. Null-coalescing assignmentīeginning with C# 8.0, you can use the null-coalescing assignment operator ?= to assign the value of its right-hand operand to its left-hand operand only if the left-hand operand evaluates to null. Compound assignmentįor a binary operator op, a compound assignment expression of the form x op= yĬompound assignment is supported by arithmetic, Boolean logical, and bitwise logical and shift operators. In the case of the ref assignment operator, both of its operands must be of the same type. The following example demonstrates the usage of the ref assignment operator: void Display(double s) => Console.WriteLine(string.Join(" ", s))
The following example demonstrates the usage of the assignment operator with a local variable, a property, and an indexer element as its left-hand operand: var numbers = new List() ĭouble originalFirstElement = numbers īeginning with C# 7.3, you can use the ref assignment operator = ref to reassign a ref local or ref readonly local variable.
The assignment operator = is right-associative, that is, an expression of the form a = b = c The type of the right-hand operand must be the same as the type of the left-hand operand or implicitly convertible to it. The result of an assignment expression is the value assigned to the left-hand operand.
The assignment operator = assigns the value of its right-hand operand to a variable, a property, or an indexer element given by its left-hand operand.
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