Why does int32.maxvalue + 1 overflow a long?

by

It is because the calculations on the right hand side of assignment is being done in integer type. And it is overflowing integer

You can fix that with:

public const long MAXIMUM_RANGE_MAGNITUDE = int.MaxValue + (long)1; // or 1L

By casting at least one of the operand to long

The reason you get the error is specified in C# specifications.

See C# Specification Section 4.1.5 (Integral types)

For the binary +, –, *, /, %, &, ^, |, ==, !=, >, <, >=, and <=
operators, the operands are converted to type T, where T is the first
of int, uint, long, and ulong that can fully represent all possible
values of both operands. The operation is then performed using the
precision of type T, and the type of the result is T (or bool for the
relational operators). It is not permitted for one operand to be of
type long and the other to be of type ulong with the binary operators.

In your case since both operands of addition can be represented in int therefore the calculation is done in integer type. Explicitly casting one of the operand to long would result in long result and thus no overflow error.

More Related Contents:

  1. How do I use reflection to call a generic method?
  2. How do I turn a C# object into a JSON string in .NET?
  3. How to inject Javascript in WebBrowser control?
  4. EntityFramework – contains query of composite key
  5. C# – Get a list of files excluding those that are hidden
  6. Convert string to nullable type (int, double, etc…)
  7. What replaces WCF in .Net Core?
  8. Windows Forms Graphic Issue on Windows 10 OS
  9. Hide form instead of closing when close button clicked
  10. Does .NET’s HttpWebResponse uncompress automatically GZiped and Deflated responses?
  11. Step by step tutorial to use SAP. net Connector with VS 2008 [closed]
  12. Is correct to use GC.Collect(); GC.WaitForPendingFinalizers();?
  13. Peculiar overload resolution with while (true)
  14. Get timestamp from Authenticode Signed files in .NET
  15. What is a good RDF library for .net? [closed]
  16. How to find out if a file exists in C# / .NET?
  17. CryptographicException was unhandled: System cannot find the specified file
  18. How to serialize an Exception object in C#?
  19. Get Cell Value from a DataTable in C#
  20. Can I have a variable number of generic parameters?
  21. Looking for a Command Line Argument Parser for .NET [closed]
  22. MEF with MVC 4 or 5 – Pluggable Architecture (2014)
  23. The extern alias ‘xxx’ was not specified in a /reference option
  24. ThreadStaticAttribute in ASP.NET
  25. Is it possible to bind complex type properties to a datagrid?
  26. WPF TwoWay Binding to a static class Property
  27. How to add extension methods to Enums
  28. Operator “>” cannot be applied to type ‘ulong’ and ‘int’
  29. Active solution platform VS Project Platform VS Platform target
  30. How to set text to a control from resource file in design time?

Leave a Comment