Caution when upgrade WinService from .NET 1.1 To .NET 2.0

When you try to upgrade a WinService from .NET 1.1 to .NET 2.0, Please pay attention at the thread mode. In .NET 1.1, the default value of the thread mode is background. However, the default value of the thread mode is changed in .NET 2.0.

In .NET 2.0, You need to explicitly set the thread mode to background.

Reduce LDAP connection creation

I have a problem when my application runs to do a high-volumn LDAP operation.

This is the original codes. This code creation a lot of TCP port to AD with "TIME WAIT" status.

private void AddToGroup(UserPrincipal currentUser, GroupPrincipal group)
{
using (DirectoryEntry dirEntry = new DirectoryEntry(string.Format("LDAP://{0}/{1}", group.Context.ConnectedServer, group.DistinguishedName)))
{
dirEntry.Properties["member"].Add(currentUser.DistinguishedName);
dirEntry.CommitChanges();
dirEntry.Close();
dirEntry.Dispose();
}
}

In order to reduce the LDAP connection creation from using SDS.AM. We could use the GetUnderlyingObject() method to get the corresponding DirectoryEntry object of the UserPrincipal or GroupPrincipal. Using this way, my application could finish its task without error. Here is the new codes to do the same thing.

private void AddToGroup(UserPrincipal currentUser, GroupPrincipal group)
{
using (DirectoryEntry gEntry = (DirectoryEntry)group.GetUnderlyingObject())
{
gEntry.Properties["member"].Add(currentUser.DistinguishedName);
gEntry.CommitChanges();
}
}

Here is a reference from Microsoft. http://msdn.microsoft.com/en-us/library/bb924562.aspx

No wrap for Telerik RadGrid cell content

Put the cell content between < nobr></nobr>

Get Mime Type from IIS

Except the System.DirectoryServices, I also need to add a reference of com object "Active DS IIS Namespace Provider" in VS.

using System.DirectoryServices;

public static string GetMimeType(string extension)
{
string retMimeType = null;

using (DirectoryEntry mimeMap = new DirectoryEntry("IIS://Localhost/MimeMap"))
{
PropertyValueCollection pValues = mimeMap.Properties["MimeMap"];

foreach (object value in pValues)
{
IISOle.IISMimeType mimeType = (IISOle.IISMimeType)value;

if (extension == mimeType.Extension)
{
retMimeType = mimeType.MimeType;
}
}

}
return retMimeType;
}

LDAP administration limits in Active Directory

LDAP Limits In Active Directory From MS.

How to view and set LDAP policy in Active Directory by using Ntdsutil.exe

Active Directory Performance Testing Tool

Here are AD performance testing tool from MS.

Active Directory Performance Testing Tool

Active Directory Performance for 64-bit Versions of Windows Server 2003

Troubleshooting Active Directory performance problems

Here is some good articles for troubleshooting Active Directory performance problems

SolutionBase: Troubleshooting Active Directory performance problems

SolutionBase: Discover Active Directory performance problems with Performance Monitor