|Important||This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here. ArchiveDisclaimer|
-= Operator (C# Reference)
The subtraction assignment operator.
An expression using the -= assignment operator, such as
x -= y
is equivalent to
x = x - y
x is only evaluated once. The meaning of the - operator is dependent on the types of
y (subtraction for numeric operands, delegate removal for delegate operands, and so forth).