first edit

XLIMS.CONTRACT/AssemblyInfo.cs

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+using System.Windows;
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None,            //where theme specific resource dictionaries are located
+                                                //(used if a resource is not found in the page,
+                                                // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly   //where the generic resource dictionary is located
+                                                //(used if a resource is not found in the page,
+                                                // app, or any theme specific resource dictionaries)
+)]

XLIMS.CONTRACT/IActivityViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace XLIMS.CONTRACT
+{
+    public interface IActivityViewModel
+    {
+        string Title { get; }
+        object View { get; }
+    }
+
+}

XLIMS.CONTRACT/IDialogService.cs

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+namespace XLIMS.CONTRACT;
+
+public interface IDialogService
+{
+    void ShowDialog<TViewModel>(TViewModel viewModel) where TViewModel : class;
+
+    // Если нужны модальные окна с результатом:
+    bool? ShowDialog<TViewModel>(TViewModel viewModel, out object? result)
+        where TViewModel : class;
+    //немодальные окна
+    void Show<TViewModel>(TViewModel viewModel) where TViewModel : class;
+}

XLIMS.CONTRACT/IGenericRepository.cs

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+using System.Linq.Expressions;
+
+namespace XLIMS.CONTRACT
+{
+    // Интерфейс generic-репозитория
+    public interface IGenericRepository<TEntity> where TEntity : class
+    {
+        Task<TEntity> GetByIdAsync(int id);
+        Task<IEnumerable<TEntity>> GetAllAsync();
+        Task<IEnumerable<TEntity>> WhereAsync(Expression<Func<TEntity, bool>> predicate);
+        IEnumerable<TEntity> Find(Expression<Func<TEntity, bool>> predicate);
+        Task<IEnumerable<TEntity>> FindAsync(Expression<Func<TEntity, bool>> predicate);
+
+        Task<TEntity> SingleOrDefaultAsync(Expression<Func<TEntity, bool>> predicate);
+
+        Task AddAsync(TEntity entity);
+        Task AddRangeAsync(IEnumerable<TEntity> entities);
+
+        Task UpdateAsync(TEntity entity);
+        Task UpdateRangeAsync(IEnumerable<TEntity> entities);
+
+        Task RemoveAsync(TEntity entity);
+        Task RemoveRangeAsync(IEnumerable<TEntity> entities);
+
+        Task<int> CountAsync(Expression<Func<TEntity, bool>> predicate = null);
+
+        event Action SetChanged;
+
+        Task<int> SaveChangesAsync();
+        int SaveChanges();
+    }
+}

XLIMS.CONTRACT/ILimsService.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+using XLIMS.DATA.Models;
+
+namespace XLIMS.CONTRACT
+{
+    public interface ILimsService
+    {
+        IGenericRepository<BookSet> Books { get; }
+        IGenericRepository<DataSet> Datas { get; }
+        IGenericRepository<DeviceSet> Devices { get; }
+        IGenericRepository<DivisionSet> Divisions { get; }
+        IGenericRepository<DocumentSet> Documents { get; }
+        IGenericRepository<PersonalSet> Personals { get; }
+        IGenericRepository<Spnmtp> Spnmtps { get; }
+        IGenericRepository<Spoi> Spois { get; }
+        IGenericRepository<Tip> Tips { get; }
+        IGenericRepository<Tprz> Tprzs { get; }
+
+        Task<int> SaveChangesAsync();
+        int SaveChanges();
+    }
+}

XLIMS.CONTRACT/XLIMS.CONTRACT.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net10.0-windows</TargetFramework>
+    <Nullable>enable</Nullable>
+    <UseWPF>true</UseWPF>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Compile Remove="IBookService.cs" />
+    <Compile Remove="IDataSetService.cs" />
+    <Compile Remove="IDeviceService.cs" />
+    <Compile Remove="IDivisionService.cs" />
+    <Compile Remove="IDocumentService.cs" />
+    <Compile Remove="ILimsService1.cs" />
+    <Compile Remove="IPersonalService.cs" />
+    <Compile Remove="ISpnmtpService.cs" />
+    <Compile Remove="ISpoiService.cs" />
+    <Compile Remove="ITipService.cs" />
+    <Compile Remove="ITprzService.cs" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\XLIMS.DATA\XLIMS.DATA.csproj" />
+  </ItemGroup>
+
+</Project>