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ServicePointManager.DnsRefreshTimeout Property

Gets or sets a value that indicates how long a Domain Name Service (DNS) resolution is considered valid.

Namespace:  System.Net
Assembly:  System (in System.dll)

public static int DnsRefreshTimeout { get; set; }

Property Value

Type: System.Int32
The time-out value, in milliseconds. A value of -1 indicates an infinite time-out period. The default value is 120,000 milliseconds (two minutes).

The following code example sets this property.


ServicePointManager.UseNagleAlgorithm = true;
ServicePointManager.Expect100Continue = true;
ServicePointManager.CheckCertificateRevocationList = true;
ServicePointManager.DefaultConnectionLimit = ServicePointManager.DefaultPersistentConnectionLimit;
ServicePointManager.EnableDnsRoundRobin = true;
ServicePointManager.DnsRefreshTimeout = 4*60*1000; // 4 minutes


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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