Azure App Service
Azure App Service is a service used to create and deploy scalable, mission-critical web apps.
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App Service - .NET Decimal Places Issue
Bunny Davies
46
Reputation points
I'm a DevOps Engineer assisting a developing team with a recent issue regarding decimal places for currencies within a .NET 6 application suddenly changing from 2 to 3 without any changes being made.
The issue was first picked up by automated tests on Saturday Jan 20th which corresponds with "Routine Planned Maintenance in Progress for App Service in UK South" which started on Jan 18th but I've been unable to find any details as to what updates are included:
This notification is for previously scheduled maintenance to your Azure App Service instance(s) in UK South. The maintenance is now in progress. An update will be sent around 12 hours later or when maintenance is completed. During this time, your Azure App Service application(s) may see a brief drop in connectivity for a few seconds. Please see frequently asked questions for maintenance notifications: Routine maintenance for App Service. For maximum availability and minimal disruption to your service, follow our list of best practices outlined here: The Ultimate Guide to Running Healthy Apps in the Cloud. Feel free to refer to your portal for more information (https://aka.ms/servicehealthpm) and for any additional questions, please contact support.
The application is running on an App Service in a Windows App Service Plan with a standard SKU.
We are seeing the same issue in multiple environments which are all within the same region (UK South) and each environment has a dedicated App Service Plan. At first it was just one environment but we've seen it start impacting other environments with no related updates, pointing to a possible platform update issue.
The developers are looking at culture settings within the application but, so far, their attempts to resolve the issue have proven unsuccessful so I am looking at the platform and have the following questions:
- Is it possible to retrieve a list of updates included in the routine planned maintenance
- Does the platform have any bearing on culture settings within the application? My understanding is that Azure is
en-usandUTCby default with any differences then needing to be set in code or in application settings. - Has this issue been seen elsewhere?
Any and all help would be very appreciated.
Azure App Service
Developer technologies | .NET | Other
4,103 questions
{count} votes
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Stuart Kelly 5 Reputation points2024-01-25T15:24:48.4033333+00:00 I have the same issue with en-GB, it shows three decimal places
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Ben Gimblett 4,560 Reputation points Microsoft Employee2024-01-26T11:59:38.2866667+00:00 Hi - thanks for the question. Not an expert in this area, but globalization definitely impacts the output format
I think the info you need is here https://learn.microsoft.com/en-us/dotnet/standard/base-types/standard-numeric-format-strings#standard-format-specifiers
This links to here https://learn.microsoft.com/en-us/dotnet/core/extensions/globalization-icu
Which has info on how you can further troubleshoot the data source (ICU, NLS etc)it also notes there's a possibility of shipping your own app local ICU data to ensure consistency - and this might well be a good option to get control over this in the future
There's an SO post here which starts at the top https://stackoverflow.com/questions/32045887/why-some-cultures-round-currency-decimals-by-default
App service team would need to comment though on whether a routine update could have caused an underlying change in the OS or sandbox with regards to globalization/culture settings
My support colleagues follow these questions and may be able to comment, but otherwise you could raise a support request for more information here
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Chris Shields 0 Reputation points2025-04-22T14:41:58.6066667+00:00 This has just happened to us 2025-04-22, no changes to EF database/model or code/app service. Decimals are now defaulting to rounding to 3 places not 2. Any idea what could have changed?
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