Add project files.

BMA.EHR.Application/ApplicationServicesRegistration.cs

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+using BMA.EHR.Application.Repositories;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace BMA.EHR.Application
+{
+	public static class ApplicationServicesRegistration
+	{
+		public static IServiceCollection AddApplication(this IServiceCollection services)
+		{
+			services.AddTransient<PrefixRepository>();
+			services.AddTransient<BloodGroupRepository>();
+
+			return services;
+		}
+	}
+}

BMA.EHR.Application/BMA.EHR.Application.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+	<PropertyGroup>
+		<TargetFramework>net7.0</TargetFramework>
+		<ImplicitUsings>enable</ImplicitUsings>
+		<Nullable>enable</Nullable>
+	</PropertyGroup>
+
+	<ItemGroup>
+		<PackageReference Include="Microsoft.EntityFrameworkCore" Version="7.0.5" />
+		<PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="7.0.0" />
+		<PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+	</ItemGroup>
+
+	<ItemGroup>
+	  <ProjectReference Include="..\BMA.EHR.Domain\BMA.EHR.Domain.csproj" />
+	</ItemGroup>
+
+</Project>

BMA.EHR.Application/Common/Interfaces/IApplicationDBContext.cs

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+using BMA.EHR.Domain.Entities.MetaData;
+using Microsoft.EntityFrameworkCore;
+
+namespace BMA.EHR.Application.Common.Interfaces
+{
+	public interface IApplicationDBContext
+	{
+		DbSet<PrefixEntity> Prefixes { get; set; }
+
+		DbSet<BloodGroupEntity> BloodGroups { get; set; }
+
+		Task<int> SaveChangesAsync();
+	}
+}

BMA.EHR.Application/Common/Interfaces/IGenericRepository.cs

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+namespace BMA.EHR.Application.Common.Interfaces
+{
+	public interface IGenericRepository<S,T> where T : class
+	{
+		Task<T?> GetByIdAsync(S id);
+
+		Task<IReadOnlyList<T>> GetAllAsync();
+	}
+}

BMA.EHR.Application/Repositories/BloodGroupRepository.cs

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+using BMA.EHR.Application.Common.Interfaces;
+using BMA.EHR.Domain.Entities.MetaData;
+using Microsoft.EntityFrameworkCore;
+
+namespace BMA.EHR.Application.Repositories
+{
+	public class BloodGroupRepository : IGenericRepository<Guid, BloodGroupEntity>
+	{
+		private readonly IApplicationDBContext _dbContext;
+
+		public BloodGroupRepository(IApplicationDBContext dbContext)
+		{
+			_dbContext = dbContext;
+		}
+
+		public async Task<IReadOnlyList<BloodGroupEntity>> GetAllAsync()
+		{
+			return await _dbContext.BloodGroups.ToListAsync();
+		}
+
+		public async Task<BloodGroupEntity?> GetByIdAsync(Guid id)
+		{
+			return await _dbContext.BloodGroups.FirstOrDefaultAsync(x => x.Id == id);
+		}
+	}
+}

BMA.EHR.Application/Repositories/PrefixRepository.cs

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+using BMA.EHR.Application.Common.Interfaces;
+using BMA.EHR.Domain.Entities.MetaData;
+using Microsoft.EntityFrameworkCore;
+
+namespace BMA.EHR.Application.Repositories
+{
+	public class PrefixRepository : IGenericRepository<Guid, PrefixEntity>
+	{
+		private readonly IApplicationDBContext _dbContext;
+
+		public PrefixRepository(IApplicationDBContext dbContext)
+		{
+			_dbContext = dbContext;
+		}
+
+		public async Task<IReadOnlyList<PrefixEntity>> GetAllAsync()
+		{
+			return await _dbContext.Prefixes.ToListAsync();
+		}
+
+		public async Task<PrefixEntity?> GetByIdAsync(Guid id)
+		{
+			return await _dbContext.Prefixes.FirstOrDefaultAsync(x => x.Id == id);
+		}
+	}
+}