CODEWITHSUNDEEP
c#.net-framework-version
MD SHAHIDUL ISLAM
MD SHAHIDUL ISLAM

Reputation: 14523

C#: MAC addres reading

Following script to read MAC address in C# and working fine for .Net Framework 4

macAddr =
    (
        from nic in NetworkInterface.GetAllNetworkInterfaces()
        where nic.OperationalStatus == OperationalStatus.Up
        select nic.GetPhysicalAddress().ToString()

    ).FirstOrDefault();

But the problem is I need to build it for .Net Framework 3

When I use .Net Framework 3 then following error occurs

Could not find an implementation of the query pattern for source type 'System.Net.NetworkInformation.NetworkInterface[]'. 'Where' not found. Are you missing a reference or a using directive for 'System.Linq'?
(are you missing an assembly reference?)

What will be the solution. Thanks in advance

Upvotes: 0

Views: 87

Answers (2)

Carbine
Carbine

Reputation: 7903

Since you are in .net version 3.0 you cannot use Linq query as above. Use a simple foreach loop as shown below to iterate through the list and fetch the value.

foreach(var nic in NetworkInterface.GetAllNetworkInterfaces())
{
   if(nic.OperationalStatus == OperationalStatus.Up)
   {
    return nic.GetPhysicalAddress();
   }
}
return string.Empty();

Upvotes: 1

Thiru
Thiru

Reputation: 3373

The feature System.Linq was introduced in the .NET Framework 3.5. Please refer this link https://msdn.microsoft.com/en-us/library/system.linq(v=vs.90).aspx

If you are using .NET 3.5 then add the update the references.

Upvotes: 0

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