This analyzer detects division operations in which both parts are of the integral type. In this case, the C# division operation returns an integral result. Since the division of integer numbers can produce a floating point number, the integral result can be unwanted.
Dim a As Double = 1 \ 7 ' CRR0020
' Output: 0
To fix this in C#, add the type suffix or ".0" to any literal operand. If the division operation includes no literals, cast one or more operands to the required floating-point type. In Visual Basic, you should change the "" operation to "/".