() Operator (C# Reference)


Updated: July 20, 2015

For the latest documentation on Visual Studio 2017 RC, see Visual Studio 2017 RC Documentation.

In addition to being used to specify the order of operations in an expression, parentheses are used to perform the following tasks:

  1. Specify casts, or type conversions.

                double x = 1234.7;
                int a;
                a = (int)x; // Cast double to int    

  2. Invoke methods or delegates.


A cast explicitly invokes the conversion operator from one type to another; the cast fails if no such conversion operator is defined. To define a conversion operator, see explicit and implicit.

The () operator cannot be overloaded.

For more information, see Casting and Type Conversions.

A cast expression could lead to ambiguous syntax. For example, the expression (x)–y could be either interpreted as a cast expression (a cast of –y to type x) or as an additive expression combined with a parenthesized expression, which computes the value x – y.

For more information about method invocation, see Methods.

For more information, see the C# Language Specification. The language specification is the definitive source for C# syntax and usage.

C# Reference
C# Programming Guide
C# Operators