How to convert the byte array fetched from LDAP Server to certificate file in c#?

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ASP.NET

C#3.5

LDAP

How to convert the byte array fetched from LDAP Server to certificate file in c#?

I am fetching the certificate from LDAP Server. I am getting the same as a binary file. Want to fetch the corresponding certificate for the same and add to the store.
My code is a below:
string test = "LDAP://" + ldapserver + "/" + ldapbasedn;
using (DirectoryEntry entry = new DirectoryEntry("LDAP://" + ldapserver + "/" + ldapbasedn, ldapuser, ldappassword, AuthenticationTypes.None))
{
DirectorySearcher ds = new DirectorySearcher(entry);
ds.SearchScope = SearchScope.Subtree;
//ds.Filter = string.Format(ldapfilter, user);
SearchResultCollection result = ds.FindAll();
int i = 0;
foreach (SearchResult r in result)
{
//string s = r.Properties["objectClass"][i].ToString();
//string s1 = r.Properties["adspath"][i].ToString();
//string s2 = r.Properties["dc"][i].ToString();
if (r.Properties.Contains("usercertificate;binary"))
{


Byte[] b = (Byte[])r.Properties["usercertificate;binary"][i];
}
}