diff --git a/Authorize.NET/Environment.cs b/Authorize.NET/Environment.cs
index fb2c503..9eacd4a 100644
--- a/Authorize.NET/Environment.cs
+++ b/Authorize.NET/Environment.cs
@@ -19,130 +19,134 @@ namespace AuthorizeNet
     public class Environment {
         public static readonly Environment SANDBOX = new Environment("https://test.authorize.net", "https://apitest.authorize.net", "https://test.authorize.net");
         public static readonly Environment PRODUCTION = new Environment("https://secure2.authorize.net","https://api2.authorize.net","https://cardpresent.authorize.net");
-	    public static readonly Environment LOCAL_VM = new Environment(null, null, null);
-	    public static readonly Environment HOSTED_VM = new Environment(null, null, null);
+        public static readonly Environment LOCAL_VM = new Environment(null, null, null);
+        public static readonly Environment HOSTED_VM = new Environment(null, null, null);
         public static Environment CUSTOM = new Environment(null, null, null);
 
-	    private String _baseUrl;
-	    private String _xmlBaseUrl;
-	    private String _cardPresentUrl;
-
-	    private Environment(String baseUrl, String xmlBaseUrl, String cardPresentUrl) {
-		    _baseUrl = baseUrl;
-		    _xmlBaseUrl = xmlBaseUrl;
-		    _cardPresentUrl = cardPresentUrl;
-	    }
-
-	    /**
-	     * @return the baseUrl
-	     */
-	    public String getBaseUrl() {
-		    return _baseUrl;
-	    }
-
-	    /**
-	     * @return the xmlBaseUrl
-	     */
-	    public String getXmlBaseUrl() {
-		    return _xmlBaseUrl;
-	    }
-
-	    /**
-	     * @return the cardPresentUrl
-	     */
-	    public String getCardPresentUrl() {
-		    return _cardPresentUrl;
-	    }
-
-	    /**
-	     * If a custom environment needs to be supported, this convenience create
-	     * method can be used to pass in a custom baseUrl.
-	     *
-	     * @param baseUrl
-	     * @param xmlBaseUrl
-	     * @return Environment object
-	     */
-	    public static Environment createEnvironment(String baseUrl, String xmlBaseUrl) {
-
-		    return createEnvironment( baseUrl, xmlBaseUrl, null);
-	    }
-
-	    /**
-	     * If a custom environment needs to be supported, this convenience create
-	     * method can be used to pass in a custom baseUrl.
-	     *
-	     * @param baseUrl
-	     * @param xmlBaseUrl
-	     * @param cardPresentUrl
-	     *
-	     * @return Environment object
-	     */
-	    public static Environment createEnvironment(String baseUrl, String xmlBaseUrl, String cardPresentUrl) {
-		    var environment = Environment.CUSTOM;
-		    environment._baseUrl = baseUrl;
-		    environment._xmlBaseUrl = xmlBaseUrl;
-		    environment._cardPresentUrl = cardPresentUrl;
-
-		    return environment;
-	    }
-	
-	    /**
-	     * Reads a integer value from property file and/or the environment
-	     * Values in property file supersede the values set in environment
-	     * @param propertyName name of the integer property to read
-	     * @return int property value
-	     */
-	    public static int getIntProperty( String propertyName) 
-	    {
-	        var stringValue = GetProperty(propertyName);
+        private String _baseUrl;
+        private String _xmlBaseUrl;
+        private String _cardPresentUrl;
+
+        private Environment(String baseUrl, String xmlBaseUrl, String cardPresentUrl) {
+            _baseUrl = baseUrl;
+            _xmlBaseUrl = xmlBaseUrl;
+            _cardPresentUrl = cardPresentUrl;
+        }
+
+        /**
+         * @return the baseUrl
+         */
+        public String getBaseUrl() {
+            return _baseUrl;
+        }
+
+        /**
+         * @return the xmlBaseUrl
+         */
+        public String getXmlBaseUrl() {
+            return _xmlBaseUrl;
+        }
+
+        /**
+         * @return the cardPresentUrl
+         */
+        public String getCardPresentUrl() {
+            return _cardPresentUrl;
+        }
+
+        /**
+         * If a custom environment needs to be supported, this convenience create
+         * method can be used to pass in a custom baseUrl.
+         *
+         * @param baseUrl
+         * @param xmlBaseUrl
+         * @return Environment object
+         */
+        public static Environment createEnvironment(String baseUrl, String xmlBaseUrl) {
+
+            return createEnvironment( baseUrl, xmlBaseUrl, null);
+        }
+
+        /**
+         * If a custom environment needs to be supported, this convenience create
+         * method can be used to pass in a custom baseUrl.
+         *
+         * @param baseUrl
+         * @param xmlBaseUrl
+         * @param cardPresentUrl
+         *
+         * @return Environment object
+         */
+        public static Environment createEnvironment(String baseUrl, String xmlBaseUrl, String cardPresentUrl) {
+            var environment = Environment.CUSTOM;
+            environment._baseUrl = baseUrl;
+            environment._xmlBaseUrl = xmlBaseUrl;
+            environment._cardPresentUrl = cardPresentUrl;
+
+            return environment;
+        }
+    
+        /**
+         * Reads a integer value from property file and/or the environment
+         * Values in property file supersede the values set in environment
+         * @param propertyName name of the integer property to read
+         * @return int property value
+         */
+        public static int getIntProperty( String propertyName) 
+        {
+            var stringValue = GetProperty(propertyName);
             var value = (AuthorizeNet.Util.StringUtils.ParseInt(stringValue));
-		
-		    return value;
-	    }
-
-	    /**
-	     * Reads a boolean value from property file and/or the environment
-	     * Values in property file supersede the values set in environment
-	     * @param propertyName name of the boolean property to read
-	     * @return boolean property value
-	     */
-	    public static bool getBooleanProperty( String propertyName) 
-	    {
-		    var value = false;
-		    var stringValue = GetProperty(propertyName);
-		    if ( null != stringValue)
-		    {
-			    Boolean.TryParse(stringValue.Trim(), out value); 
-		    }
-		
-		    return value;
-	    }
-
-	    /// <summary>
-	    /// Reads the value from property file and/or the environment 
-	    /// Values in property file supersede the values set in environmen
-	    /// </summary>
+        
+            return value;
+        }
+
+        /**
+         * Reads a boolean value from property file and/or the environment
+         * Values in property file supersede the values set in environment
+         * @param propertyName name of the boolean property to read
+         * @return boolean property value
+         */
+        public static bool getBooleanProperty( String propertyName) 
+        {
+            var value = false;
+            var stringValue = GetProperty(propertyName);
+            if ( null != stringValue)
+            {
+                Boolean.TryParse(stringValue.Trim(), out value); 
+            }
+        
+            return value;
+        }
+
+        private static object mutex = new object();
+
+        /// <summary>
+        /// Reads the value from property file and/or the environment 
+        /// Values in property file supersede the values set in environmen
+        /// </summary>
         /// <param name="propertyName">propertyName name of the property to read</param>
         /// <returns>String property value</returns>
-	    public static String GetProperty(String propertyName) {
-		    String stringValue = null;
+        public static String GetProperty(String propertyName) {
+            String stringValue = null;
+            String propValue = null;
 
-	        String propValue = null;
-            if ( ConfigurationManager.AppSettings.AllKeys.Contains(propertyName))
-	        {
-	            propValue = ConfigurationManager.AppSettings[propertyName];
-	        }
+            lock(mutex) {
+                if (!string.IsNullOrEmpty(ConfigurationManager.AppSettings.Get(propertyName)))
+                {
+                    propValue = ConfigurationManager.AppSettings.Get(propertyName);
+                }
+            }
 
             var envValue = System.Environment.GetEnvironmentVariable(propertyName);
-		    if ( null != propValue && propValue.Trim().Length > 0 )
-		    {
-			    stringValue = propValue;
-		    }
-		    else if ( null != envValue && envValue.Trim().Length > 0 )
-		    {
-			    stringValue = envValue;
-		    }
-		    return stringValue;
-	    }
+            if ( null != propValue && propValue.Trim().Length > 0 )
+            {
+                stringValue = propValue;
+            }
+            else if ( null != envValue && envValue.Trim().Length > 0 )
+            {
+                stringValue = envValue;
+            }
+            return stringValue;
+        }
     }
 }
\ No newline at end of file
diff --git a/Authorize.NET/Properties/AssemblyInfo.cs b/Authorize.NET/Properties/AssemblyInfo.cs
index 26ebac3..3c712e0 100644
--- a/Authorize.NET/Properties/AssemblyInfo.cs
+++ b/Authorize.NET/Properties/AssemblyInfo.cs
@@ -30,7 +30,7 @@
 //      Revision
 //
 // See AssemblyFileVersion.cs for Product and Assembly Version
-//[assembly: AssemblyVersion("2.0.1.0")]
-[assembly: AssemblyFileVersion("2.0.2.0")]
-[assembly: AssemblyVersion("2.0.2.0")]
+//[assembly: AssemblyVersion("2.0.2.0")]
+[assembly: AssemblyFileVersion("2.0.3.0")]
+[assembly: AssemblyVersion("2.0.3.0")]
 
diff --git a/Authorize.NET/Util/Constants.cs b/Authorize.NET/Util/Constants.cs
index 91e1141..cc21308 100644
--- a/Authorize.NET/Util/Constants.cs
+++ b/Authorize.NET/Util/Constants.cs
@@ -26,7 +26,7 @@ public static class Constants {
         public const int HttpConnectionDefaultTimeout = 30000;
         public const int HttpReadWriteDefaultTimeout = 30000;
 
-        public const string SDKVersion = "2.0.2";
+        public const string SDKVersion = "2.0.3";
 
     }
 #pragma warning restore 1591
diff --git a/AuthorizeNet.nuspec b/AuthorizeNet.nuspec
index 52de83e..62b206a 100644
--- a/AuthorizeNet.nuspec
+++ b/AuthorizeNet.nuspec
@@ -2,7 +2,7 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
     <metadata>
         <id>AuthorizeNet</id>
-        <version>2.0.2</version>
+        <version>2.0.3</version>
         <title>AuthorizeNet</title>
         <authors>Authorize.Net</authors>
         <owners>AuthorizeNet</owners>