net5.0 
namespace System.Data.SqlClient
{
    [Obsolete("Use the Microsoft.Data.SqlClient package instead.")]
    public sealed class SqlConnection : DbConnection, ICloneable
    {
        public override int ConnectionTimeout { get; }
    }
}
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Reference this API
.NET 5.06.07.08.09.010.0
.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 net5.0
Assembly

System.Data.SqlClient , Version=4.6.1.6, PublicKeyToken=b03f5f7f11d50a3a

Referencing

Your project needs a package reference to System.Data.SqlClient.

Package System.Data.SqlClient (4.9.0) netstandard2.0
Platform Restrictions

The property getter is supported on all platforms.

  • Built-in API
  • Package-provided API