Improve code quality

Author: Jack251970

Flow.Launcher.Core/Plugin/PluginConfig.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.IO;
@@ -9,7 +9,6 @@
 
 namespace Flow.Launcher.Core.Plugin
 {
-
     internal abstract class PluginConfig
     {
         /// <summary>
@@ -112,7 +111,7 @@ private static PluginMetadata GetPluginMetadata(string pluginDirectory)
                 metadata = JsonSerializer.Deserialize<PluginMetadata>(File.ReadAllText(configPath));
                 metadata.PluginDirectory = pluginDirectory;
                 // for plugins which doesn't has ActionKeywords key
-                metadata.ActionKeywords = metadata.ActionKeywords ?? new List<string> { metadata.ActionKeyword };
+                metadata.ActionKeywords ??= new List<string> { metadata.ActionKeyword };
                 // for plugin still use old ActionKeyword
                 metadata.ActionKeyword = metadata.ActionKeywords?[0];
             }
@@ -137,4 +136,4 @@ private static PluginMetadata GetPluginMetadata(string pluginDirectory)
             return metadata;
         }
     }
-}
+}

Flow.Launcher.Core/Plugin/PluginsLoader.cs

@@ -81,7 +81,7 @@ public static IEnumerable<PluginPair> DotNetPlugins(List<PluginMetadata> source)
                             metadata.PluginCacheDirectoryPath = Path.Combine(DataLocation.PluginCacheDirectory, assemblyName);
                         }
 #if DEBUG
-                        catch (Exception e)
+                        catch (Exception)
                         {
                             throw;
                         }
@@ -117,7 +117,7 @@ public static IEnumerable<PluginPair> DotNetPlugins(List<PluginMetadata> source)
 
             if (erroredPlugins.Count > 0)
             {
-                var errorPluginString = String.Join(Environment.NewLine, erroredPlugins);
+                var errorPluginString = string.Join(Environment.NewLine, erroredPlugins);
 
                 var errorMessage = "The following "
                                    + (erroredPlugins.Count > 1 ? "plugins have " : "plugin has ")

Flow.Launcher.Infrastructure/UserSettings/PluginSettings.cs

@@ -32,10 +32,8 @@ public void UpdatePluginSettings(List<PluginMetadata> metadatas)
         {
             foreach (var metadata in metadatas)
             {
-                if (Plugins.ContainsKey(metadata.ID))
+                if (Plugins.TryGetValue(metadata.ID, out var settings))
                 {
-                    var settings = Plugins[metadata.ID];
-
                     if (string.IsNullOrEmpty(settings.Version))
                         settings.Version = metadata.Version;