net11.0-windows7.0 
namespace System.Net
{
    public static class Dns
    {
        [Obsolete("BeginGetHostByName is obsoleted for this type, please use BeginGetHostEntry instead. https://go.microsoft.com/fwlink/?linkid=14202")]
        public static IAsyncResult BeginGetHostByName(string hostName, AsyncCallback requestCallback, object stateObject);
    }
}
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Reference this API
.NET
5.06.07.08.09.010.011.0
.NET Core
2.02.12.23.03.1
.NET Framework
1.01.12.03.03.54.04.54.5.14.5.24.64.6.14.6.24.74.7.14.7.24.84.8.1
.NET Standard
2.02.1
Information specific to net11.0
Platforms This API is only available when you target a specific platform:
Windows
7.0
Information specific to net11.0-windows7.0
Assembly

System.Net.NameResolution , Version=4.1.1.0, PublicKeyToken=b03f5f7f11d50a3a

Referencing

Your project needs a package reference to Microsoft.AspNetCore.App.

Package Microsoft.AspNetCore.App (3.0.0-preview3-19153-02) netcoreapp3.0
Obsolete BeginGetHostByName is obsoleted for this type, please use BeginGetHostEntry instead. https://go.microsoft.com/fwlink/?linkid=14202
Platform Restrictions

This API is supported on all platforms.

  • Built-in API
  • Package-provided API