It seems like the DebuggerDisplayAttribute is not having any effect in Visual Studio 2017 (15.9.4) with Resharper 2018.2.3.
- Placing the attribute in AssemblyInfo.cs, or in Program.cs, has no discernible effect.
- I am targeting .Net Framework 4.7.2. Changing the framework version also has no discernible effect.
- I have verified that "Show raw structure of objects in variables windows" is unchecked in Tools -> Options -> Debugging -> General. I even checked it, closed VS, reopened VS, and unchecked it, just to be sure. No effect.
- Placing the attribute on a custom class does have an effect. It seems that the attribute is only being ignored when at the assembly level.
- This works as expected in VS 2015 (with the same version of Resharper).
- Starting VS 2017 in safe mode (using
devenv.exe /safemode) has no effect. - Updating VS 15.9.4 -> 15.9.7 has no effect.
Here is a very basic console application. Despite the attribute, the dt variable appears as {2/14/2019 10:35:38 AM} in my watch window.
[assembly: DebuggerDisplay("Foo", Target = typeof(DateTime))]
namespace ConsoleApp1
{
class Program
{
static void Main(string[] args)
{
var dt = DateTime.Now;
Debugger.Break();
}
}
}
If I use ILSpy to decompile my console application, I can see these attributes applied:
[assembly: Debuggable(
DebuggableAttribute.DebuggingModes.Default |
DebuggableAttribute.DebuggingModes.DisableOptimizations |
DebuggableAttribute.DebuggingModes.IgnoreSymbolStoreSequencePoints |
DebuggableAttribute.DebuggingModes.EnableEditAndContinue)]
[assembly: DebuggerDisplay("Foo", Target = typeof(DateTime))]
Why isn't the attribute doing anything? How do I even begin to debug this?
Edit: Complete source files as requested.
ConsoleApp1.csproj
<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
<PropertyGroup>
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
<ProjectGuid>{EBBA72C6-5087-4D8E-9F2C-B968ABD59EAA}</ProjectGuid>
<OutputType>Exe</OutputType>
<RootNamespace>ConsoleApp1</RootNamespace>
<AssemblyName>ConsoleApp1</AssemblyName>
<TargetFrameworkVersion>v4.7.2</TargetFrameworkVersion>
<FileAlignment>512</FileAlignment>
<AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
<Deterministic>true</Deterministic>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
<PlatformTarget>AnyCPU</PlatformTarget>
<DebugSymbols>true</DebugSymbols>
<DebugType>full</DebugType>
<Optimize>false</Optimize>
<OutputPath>bin\Debug\</OutputPath>
<DefineConstants>DEBUG;TRACE</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
<PlatformTarget>AnyCPU</PlatformTarget>
<DebugType>pdbonly</DebugType>
<Optimize>true</Optimize>
<OutputPath>bin\Release\</OutputPath>
<DefineConstants>TRACE</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
</PropertyGroup>
<ItemGroup>
<Reference Include="System" />
<Reference Include="System.Core" />
<Reference Include="System.Xml.Linq" />
<Reference Include="System.Data.DataSetExtensions" />
<Reference Include="Microsoft.CSharp" />
<Reference Include="System.Data" />
<Reference Include="System.Net.Http" />
<Reference Include="System.Xml" />
</ItemGroup>
<ItemGroup>
<Compile Include="Program.cs" />
<Compile Include="Properties\AssemblyInfo.cs" />
</ItemGroup>
<ItemGroup>
<None Include="App.config" />
</ItemGroup>
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
</Project>
app.config:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
</startup>
</configuration>
AssemblyInfo.cs:
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
[assembly: AssemblyTitle("ConsoleApp1")]
[assembly: AssemblyDescription("")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("")]
[assembly: AssemblyProduct("ConsoleApp1")]
[assembly: AssemblyCopyright("Copyright © 2019")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCulture("")]
[assembly: ComVisible(false)]
[assembly: Guid("ebba72c6-5087-4d8e-9f2c-b968abd59eaa")]
[assembly: AssemblyVersion("1.0.0.0")]
[assembly: AssemblyFileVersion("1.0.0.0")]
