DirectoryEntry.Exists(String) Method  
Definition
Important
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Determines if the specified path represents an actual entry in the directory service.
public:
 static bool Exists(System::String ^ path);public static bool Exists(string path);static member Exists : string -> boolPublic Shared Function Exists (path As String) As BooleanParameters
- path
- String
The path of the entry to verify.
Returns
true if the specified path represents a valid entry in the directory service; otherwise, false.
Examples
The following example takes one argument and determines whether the path corresponds to a valid DirectoryEntry.
Dim myADSPath As String = "LDAP://onecity/CN=Users,DC=onecity,DC=corp,DC=fabrikam,DC=com"
' Determine whether the given path is correct for the DirectoryEntry.
If DirectoryEntry.Exists(myADSPath) Then
   Console.WriteLine("The path {0} is valid",myADSPath)
Else
   Console.WriteLine("The path {0} is invalid",myADSPath)
End If
string myADSPath ="LDAP://onecity/CN=Users,DC=onecity,DC=corp,DC=fabrikam,DC=com";
// Determine whether the given path is correct for the DirectoryEntry.
if (DirectoryEntry.Exists(myADSPath))
{
    Console.WriteLine("The path {0} is valid",myADSPath);
}
    else
{
    Console.WriteLine("The path {0} is invalid",myADSPath);
}