Type Conversion in Expressions : Data Type Cast « Data Type « C# / CSharp Tutorial

C#'s type promotion rules. Here is the algorithm that they define for binary operations:

1. IF one operand is a decimal, THEN the other operand is promoted to decimal (unless it is of type float or double, in which case an error results).
2. ELSE IF one operand is a double, the second is promoted to double.
3. ELSE IF one operand is a float, the second is promoted to float.
4. ELSE IF one operand is a ulong, the second is promoted to ulong (unless it is of type sbyte, short, int, or long, in which case an error results).
5. ELSE IF one operand is a long, the second is promoted to long.
6. ELSE IF one operand is a uint and the second is of type sbyte, short, or int, both are promoted to long.
7. ELSE IF one operand is a uint, the second is promoted to uint.
8. ELSE both operands are promoted to int.

Quote from Book: C# The Complete Reference Paperback: 933 pages Publisher: Osborne/McGraw-Hill (March 8, 2002) Language: English ISBN-10: 0072134852 ISBN-13: 978-0072134858

A cast has this general form:

When a cast involves a narrowing conversion, information might be lost.