Renamed folder

SchengenVisaApi/ApplicationLayer/InfrastructureServicesInterfaces/IDateTimeProvider.cs

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+namespace ApplicationLayer.InfrastructureServicesInterfaces
+{
+    public interface IDateTimeProvider
+    {//todo rename folder
+        /// Returns current date and time
+        DateTime Now();
+    }
+}

SchengenVisaApi/ApplicationLayer/InfrastructureServicesInterfaces/IGenericRepository.cs

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+using Domains;
+
+namespace ApplicationLayer.InfrastructureServicesInterfaces;
+
+/// <summary>
+/// Generic repository pattern
+/// </summary>
+/// <typeparam name="T">Entity type</typeparam>
+public interface IGenericRepository<T> where T : class, IEntity
+{
+    /// Get all entities from data storage
+    /// <param name="cancellationToken">Cancellation token</param>
+    Task<List<T>> GetAllAsync(CancellationToken cancellationToken);
+
+    /// Get one entity with specific id
+    /// <param name="id">Identifier of entity</param>
+    /// <param name="cancellationToken">Cancellation token</param>
+    Task<T> GetByIdAsync(Guid id, CancellationToken cancellationToken);
+
+    /// Add entity to storage
+    /// <param name="entity">Entity to add</param>
+    /// <param name="cancellationToken">Cancellation token</param>
+    Task AddAsync(T entity, CancellationToken cancellationToken);
+
+    /// <summary>
+    /// Update entity in storage
+    /// </summary>
+    /// <param name="entity">Entity to update</param>
+    /// <param name="cancellationToken">Cancellation token</param>
+    Task UpdateAsync(T entity, CancellationToken cancellationToken);
+
+    /// <summary>
+    /// Remove entity from storage
+    /// </summary>
+    /// <param name="entity">Entity to remove</param>
+    void Remove(T entity);
+}

SchengenVisaApi/ApplicationLayer/InfrastructureServicesInterfaces/IUnitOfWork.cs

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+namespace ApplicationLayer.InfrastructureServicesInterfaces;
+
+public interface IUnitOfWork
+{
+    /// Saves changes in data storage
+    /// <param name="cancellationToken">Cancellation Token</param>
+    Task SaveAsync(CancellationToken cancellationToken);
+}