物性更改2

一些已知的更改

CapMachine.Core/ConfigHelper.cs

@@ -16,7 +16,8 @@ namespace CapMachine.Core
         /// <param name="key"></param>
         public static string GetValue(string key)
         {
-            return ConfigurationManager.AppSettings[key].ToString().Trim();
+            var value = ConfigurationManager.AppSettings[key];
+            return (value ?? string.Empty).Trim();
         }
 
         /// <summary>
@@ -31,7 +32,14 @@ namespace CapMachine.Core
             //cfa.Save();
 
             Configuration configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
-            configuration.AppSettings.Settings[key].Value = value;
+            if (configuration.AppSettings.Settings[key] == null)
+            {
+                configuration.AppSettings.Settings.Add(key, value);
+            }
+            else
+            {
+                configuration.AppSettings.Settings[key].Value = value;
+            }
             configuration.Save();
             ConfigurationManager.RefreshSection("appSettings");
         }