重构项目，将项目拆分（临时提交）

DMS.WPF/Message/LoadMessage.cs

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+using CommunityToolkit.Mvvm.Messaging.Messages;
+using DMS.Core.Enums;
+
+namespace DMS.Message;
+
+public class LoadMessage:ValueChangedMessage<LoadTypes>
+{
+    public LoadTypes LoadType { get; set; }
+    public LoadMessage(LoadTypes types) : base(types)
+    {
+        LoadType=types;
+    }
+}

DMS.WPF/Message/MyMessage.cs

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+using CommunityToolkit.Mvvm.Messaging.Messages;
+
+namespace DMS.Message;
+
+public class MyMessage : ValueChangedMessage<int>
+{
+    public MyMessage(int value) : base(value)
+    {
+    }
+
+    public int Count { get; set; }
+}

DMS.WPF/Message/NavgatorMessage.cs

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+using CommunityToolkit.Mvvm.Messaging.Messages;
+using DMS.ViewModels;
+
+namespace DMS.Message;
+
+public class NavgatorMessage : ValueChangedMessage<ViewModelBase>
+{
+    public Object Parameters;
+    public NavgatorMessage(ViewModelBase value,Object parameters=null) : base(value)
+    {
+        Parameters=parameters;
+    }
+}

DMS.WPF/Message/NotificationMessage.cs

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+using CommunityToolkit.Mvvm.Messaging.Messages;
+using DMS.Core.Enums;
+
+namespace DMS.Message;
+
+public class NotificationMessage : ValueChangedMessage<string>
+{
+    public NotificationMessage(string msg, NotificationType type = NotificationType.Info, bool isGlobal = false) :
+        base(msg)
+    {
+        Type = type;
+        IsGlobal = isGlobal;
+    }
+
+    public NotificationType Type { get; set; }
+    public bool IsGlobal { get; set; }
+}

DMS.WPF/Message/ReqMessage.cs

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+using CommunityToolkit.Mvvm.Messaging.Messages;
+
+namespace DMS.Message;
+
+public class ReqMessage : RequestMessage<int>
+{
+    public ReqMessage(int count)
+    {
+        Count = count;
+    }
+
+    public int Count { get; set; }
+}

DMS.WPF/Message/UpdateMenuMessage.cs

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+using CommunityToolkit.Mvvm.Messaging.Messages;
+
+namespace DMS.Message;
+
+public class UpdateMenuMessage:ValueChangedMessage<int>
+{
+    public UpdateMenuMessage(int value) : base(value)
+    {
+    }
+}