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Diffstat (limited to 'crypto/src/x509/IX509Extension.cs')
-rw-r--r--crypto/src/x509/IX509Extension.cs6
1 files changed, 3 insertions, 3 deletions
diff --git a/crypto/src/x509/IX509Extension.cs b/crypto/src/x509/IX509Extension.cs
index a08f5e052..7d7a06c04 100644
--- a/crypto/src/x509/IX509Extension.cs
+++ b/crypto/src/x509/IX509Extension.cs
@@ -1,7 +1,7 @@
 using System;
+using System.Collections.Generic;
 
 using Org.BouncyCastle.Asn1;
-using Org.BouncyCastle.Utilities.Collections;
 
 namespace Org.BouncyCastle.X509
 {
@@ -11,13 +11,13 @@ namespace Org.BouncyCastle.X509
 		/// Get all critical extension values, by oid
 		/// </summary>
 		/// <returns>IDictionary with string (OID) keys and Asn1OctetString values</returns>
-		ISet GetCriticalExtensionOids();
+		ISet<string> GetCriticalExtensionOids();
 
 		/// <summary>
 		/// Get all non-critical extension values, by oid
 		/// </summary>
 		/// <returns>IDictionary with string (OID) keys and Asn1OctetString values</returns>
-		ISet GetNonCriticalExtensionOids();
+		ISet<string> GetNonCriticalExtensionOids();
 
 		Asn1OctetString GetExtensionValue(DerObjectIdentifier oid);
 	}