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				@@ -5,21 +5,12 @@ namespace Essensoft.AspNetCore.Payment.WeChatPay 
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				     public class WeChatPayCertificateManager 
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				     { 
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				-        private readonly ConcurrentDictionary<string, X509Certificate2> _certDic = new ConcurrentDictionary<string, X509Certificate2>(); 
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				+        private readonly ConcurrentDictionary<string, X509Certificate2> _certificateDictionary = new ConcurrentDictionary<string, X509Certificate2>(); 
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				-        public bool Contains(string hash) 
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				-        { 
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				-            return _certDic.ContainsKey(hash); 
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				-        } 
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				+        public bool ContainsKey(string hash) => _certificateDictionary.ContainsKey(hash); 
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				-        public bool TryAdd(string hash, X509Certificate2 certificate) 
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				-        { 
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				-            return _certDic.TryAdd(hash, certificate); 
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				-        } 
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				+        public bool TryAdd(string hash, X509Certificate2 certificate) => _certificateDictionary.TryAdd(hash, certificate); 
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				-        public bool TryGet(string hash, out X509Certificate2 certificate) 
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				-        { 
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				-            return _certDic.TryGetValue(hash, out certificate); 
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				-        } 
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				+        public bool TryGetValue(string hash, out X509Certificate2 certificate) => _certificateDictionary.TryGetValue(hash, out certificate); 
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				     } 
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				 } 
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