What does the &= operator do in C#? [closed]

Answer 1

It means it's a compound assignment operator. Just like:

i += 1;

is like

i = i + 1;

So

approved &= cra.Approved;

is like

approved = approved & cra.Approved;

where & is the logical AND operator in this case (because we're dealing with bool values; for integers it would be the bitwise AND operator).

See section 7.17.2 of the C# 4 spec for more details of the exact nature of compound assignment operators.

Answer 2

a &= b is equal to a = (a & b).

The & operator performs a bitwise AND. This bitwise AND operation involves setting only those bits in the result that were originally set in both a and b.

Answer 3

For the bool type, it is the logical-and assignment operator. For integral types, it is the bitwise-and assignment operator.

It is effectively the same as:

approved = approved & cra.Approved;

Answer 4

This is the AND assignment operator.

It is basically doing:

approved = approved & cra.Approved;

Which will set approved to true if it was true previously AND cra.Approved is true.

Answer 5

It is a logical AND.

From MSDN (& Operator):

For bool operands, & computes the logical AND of its operands;

In your code this is the same as:

approved = approved & cra.Approved;