Disabling OBSOLETE error in C#

by

Visual Studio 2015

Build failing due to [Obsolete]?

This would only occur if “Treat Warnings As Errors” is enabled, and there is a method with the [Obsolete] attribute.

Method 1: Downgrade error to warning

Add <WarningsNotAsErrors>612,618</WarningsNotAsErrors> in the .csproj file (repeat for all sections):

<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
    <WarningLevel>4</WarningLevel>
    <WarningsNotAsErrors>612,618</WarningsNotAsErrors>
    <DebugSymbols>true</DebugSymbols>
    <DebugType>full</DebugType>
    <Optimize>false</Optimize>
    <OutputPath>bin\Debug\</OutputPath>
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
</PropertyGroup>

If dealing with many .csproj files, see Appendix A: Notepad++ for search and replace.

Method 2: Ignore error in file

Note: This method is not recommended, because it hides the warnings for methods marked [Obsolete]. We still want to see a list of
all calls to obsolete methods so we can upgrade them.

Use #pragma warning disable 612,618

Method 3: Ignore error in project

Note: This method is not recommended, because it hides the warnings for methods marked [Obsolete]. We still want to see a list of
all calls to obsolete methods so we can upgrade them.

Edit the project (repeat for all sections):

enter image description here

Method 4: Ignore error in project

Note: This method is not recommended, because it hides the warnings for methods marked [Obsolete]. We still want to see a list of
all calls to obsolete methods so we can upgrade them.

Manually edit your .csproj to disable warnings for specific errors. Add the tag <NoWarn>612,618</NoWarn> (repeat for all sections):

<PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x64'">
    <NoWarn>612,618</NoWarn>
    <DebugSymbols>true</DebugSymbols>
    <OutputPath>bin\x64\Debug\</OutputPath>
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
    <DebugType>full</DebugType>
    <PlatformTarget>x64</PlatformTarget>
    <ErrorReport>prompt</ErrorReport>        
</PropertyGroup>

Appendix A: Notepad++ for search and replace

Have a lot of files? No problem!

Open all .csproj files in NotePad++, then:

  • Find: <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
  • Replace: <TreatWarningsAsErrors>true</TreatWarningsAsErrors>\n\t<WarningsNotAsErrors>612,618</WarningsNotAsErrors>

enter image description here

More Related Contents:

  1. “Build failed” on Database First Scaffold-DbContext
  2. LINQ Using Max() to select a single row
  3. How can I make the computer beep in C#?
  4. Return more info to the client using OAuth Bearer Tokens Generation and Owin in WebApi
  5. Counting number of words in C#
  6. How the right associative of null coalescing operator behaves?
  7. .NET 4 Caching Support
  8. Adding custom attributes to an element in XAML?
  9. Windows Forms ToolTip will not re-appear after first use
  10. Populating a DataGridView with Text and ProgressBars
  11. Conditional dependency resolver on run-time (.net Core)
  12. How do I determine if a given date is the Nth weekday of the month?
  13. Which objects can I use in a finalizer method?
  14. how to handle spaces in file path if the folder contains the space?
  15. VS 2015 SSIS Script Tasks cannot be debugged
  16. Can I reuse HttpWebRequest without disconnecting from the server?
  17. SSIS Script Task cant find reference to assembly
  18. How to get CPU frequency in c#
  19. Why can’t I modify the loop variable in a foreach?
  20. Equivalent of UseUrls for .NET Core 3.1/IHostBuilder
  21. Parsing field name with a colon in JSON
  22. PostMessage WM_KEYDOWN send multiply keys?
  23. Drawing control to memory (Bitmap)
  24. Is it possible to scale Azure app services programmatically
  25. Cast an Anonymous Types in Object and retrieve one Field
  26. C# – Set Directory Permissions for All Users in Windows 7
  27. Formatting DateTime in ASP.NET Core 3.0 using System.Text.Json
  28. Get values from *.resx files in XAML
  29. How can I enumerate all managed threads in C#?
  30. Export private/public keys from X509 certificate to PEM

Leave a Comment