Ambiguous match

[thomasp]

I wrote the following function for fetching a certificate from the store (via thumbprint).

      res←yNETX509CertificateFromStoreGet rarg;⎕USING;store;certCollection;certThumbprint;valid;cert
 ⎕USING,←⊂'System.Security.Cryptography.X509Certificates,System.dll'
 certThumbprint valid←rarg
 store←X509Store.New StoreName.My StoreLocation.CurrentUser
 store.Open⊂OpenFlags.ReadOnly
 certCollection←store.Certificates.Find X509FindType.FindByThumbprint certThumbprint valid
 :If 1=certCollection.Count
     cert←certCollection.Item⊂0
     res←0 cert
 :Else
     res←¯2 ⍬
 :EndIf

It works, but when I hit this line:

      cert←certCollection.Item⊂0

I get a "Dyalog APL/W - Status" window saying:

Ambiguous match: First Entry called
System.Security.Cryptography.X509Certificates.X509Certificate2 get_Item(Int32)
System.Security.Cryptography.X509Certificates.X509Certificate get_Item(Int32)

Why does it say that? What's "Ambiguous" about it? Can I improve the code somehow to make the ambiguity go away?

[Vince|Dyalog]

Hi Thomas,

I'll ask my colleague to have a look at your question.

Regards,

Vince

[thomasp]

*bump*