'IHostingEnvironment' is obsolete
It seems IHostingEnvironment
has been replaced by IHostEnvironment
(and a few others).
You should be able to change the interface type in your code and everything will work as it used to :-)
You can find more information about the changes at this link on GitHub https://github.com/aspnet/AspNetCore/issues/7749
EDIT
There is also an additional interface IWebHostEnvironment
that can be used in ASP.NET Core applications. This is available in the Microsoft.AspNetCore.Hosting
namespace.
When
Microsoft.Extensions.Hosting
was introduced in 2.1 some types likeIHostingEnvironment
andIApplicationLifetime
were copied fromMicrosoft.AspNetCore.Hosting
. Some 3.0 changes cause apps to include both theMicrosoft.Extensions.Hosting
andMicrosoft.AspNetCore.Hosting
namespaces. Any use of those duplicate types causes an "ambiguous reference" compiler error when both namespaces are referenced.This error has been addressed in 3.0.0-preview3 by marking the following types obsolete and replacing them with new types. There have not been any behavioral changes made for the new types, only naming.
Obsolete types (warning):
Microsoft.Extensions.Hosting.IHostingEnvironment
Microsoft.AspNetCore.Hosting.IHostingEnvironment
Microsoft.Extensions.Hosting.IApplicationLifetime
Microsoft.AspNetCore.Hosting.IApplicationLifetime
Microsoft.Extensions.Hosting.EnvironmentName
Microsoft.AspNetCore.Hosting.EnvironmentName
New types:
Microsoft.Extensions.Hosting.IHostEnvironment
Microsoft.AspNetCore.Hosting.IWebHostEnvironment : IHostEnvironment
Microsoft.Extensions.Hosting.IHostApplicationLifetime
Microsoft.Extensions.Hosting.Environments
Note the new IHostEnvironment IsDevelopment, IsProduction, etc. extension methods are in the Microsoft.Extensions.Hosting namespace which may need to be added to your app.
For 3.0 both the old and new types will be available from HostBulder's and WebHostBuilder's dependency injection containers. The old types will be removed in 4.0.
Source: https://github.com/aspnet/AspNetCore/issues/7749
Long and short, you're looking for IWebHostEnvironment
now. You'll likely need to add using for Microsoft.Extensions.Hosting
as well.
For env.IsDevelopment()
, I used env.EnvironmentName.Equals("Development")
From ASP.NET Core 5, use:
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Hosting;
...
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
if (Environments.Development.Equals(env.EnvironmentName))
{
...