diff --git a/server/src/CPATapi.Server/CPATapi.Server.csproj b/server/src/CPATapi.Server/CPATapi.Server.csproj
index 81ddb06..380696f 100644
--- a/server/src/CPATapi.Server/CPATapi.Server.csproj
+++ b/server/src/CPATapi.Server/CPATapi.Server.csproj
@@ -2,11 +2,12 @@
 
   <PropertyGroup>
     <TargetFramework>net10.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Dapper" Version="2.0.78" />
-    <PackageReference Include="Microsoft.Data.SqlClient" Version="2.1.2" />
+    <PackageReference Include="Dapper" Version="2.1.72" />
+    <PackageReference Include="Microsoft.Data.SqlClient" Version="7.0.0" />
   </ItemGroup>
 
 
diff --git a/server/src/CPATapi.Server/Controllers/AvailabilityController.cs b/server/src/CPATapi.Server/Controllers/AvailabilityController.cs
index c876800..d32ae0f 100644
--- a/server/src/CPATapi.Server/Controllers/AvailabilityController.cs
+++ b/server/src/CPATapi.Server/Controllers/AvailabilityController.cs
@@ -1,46 +1,39 @@
-using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
 using Dapper;
 using Microsoft.Data.SqlClient;
-using Microsoft.Extensions.Configuration;
 
 namespace CPATapi.Server.Controllers
 {
     [Route("[controller]")]
     [ApiController]
-    public class AvailabilityController : ControllerBase
+    public class AvailabilityController(IConfiguration config) : ControllerBase
     {
-        private readonly IConfiguration _config;
-        public AvailabilityController(IConfiguration config) => _config = config;
-
         [HttpGet, Route("users")]
         public async Task<IEnumerable<string>> GetUsers()
         {
-            await using var con = new SqlConnection(_config["Db:ConnectionStringZc"]);
+            await using var con = new SqlConnection(config["Db:ConnectionStringZc"]);
             await con.OpenAsync();
-            return await con.QueryAsync<string>(@"
-SELECT DISTINCT MA_USER_NAME
-FROM dbo.MA_DATEN
-WHERE MA_USER_NAME IS NOT NULL AND MA_USER_AKTIV = 1
-ORDER BY MA_USER_NAME");
+            return await con.QueryAsync<string>("""
+                                                SELECT DISTINCT MA_USER_NAME
+                                                FROM dbo.MA_DATEN
+                                                WHERE MA_USER_NAME IS NOT NULL AND MA_USER_AKTIV = 1
+                                                ORDER BY MA_USER_NAME
+                                                """);
         }
 
         [HttpGet, Route("{user}")]
         public async Task<object> GetAvailability(string user)
         {
-            await using var con = new SqlConnection(_config["Db:ConnectionStringZc"]);
+            await using var con = new SqlConnection(config["Db:ConnectionStringZc"]);
             await con.OpenAsync();
-            var stampCount = (await con.QueryAsync(@"
-SELECT *
-FROM dbo.BU
-INNER JOIN dbo.MA_DATEN on MA_NR = BU_MA_NR
-WHERE
-  MA_USER_NAME = @user AND
-  BU_BU >= @date AND BU_BU < @tomorrow", new { user, date = DateTime.Now.Date, tomorrow = DateTime.Now.AddDays(1).Date })).Count();
+            var stampCount = (await con.QueryAsync("""
+                                                   SELECT *
+                                                   FROM dbo.BU
+                                                   INNER JOIN dbo.MA_DATEN on MA_NR = BU_MA_NR
+                                                   WHERE
+                                                     MA_USER_NAME = @user AND
+                                                     BU_BU >= @date AND BU_BU < @tomorrow
+                                                   """, new { user, date = DateTime.Now.Date, tomorrow = DateTime.Now.AddDays(1).Date })).Count();
             return new { user, loggedIn = stampCount % 2 != 0 };
         }
     }
diff --git a/server/src/CPATapi.Server/Controllers/CallerIdController.cs b/server/src/CPATapi.Server/Controllers/CallerIdController.cs
index e8eb430..24ad04e 100644
--- a/server/src/CPATapi.Server/Controllers/CallerIdController.cs
+++ b/server/src/CPATapi.Server/Controllers/CallerIdController.cs
@@ -1,20 +1,14 @@
-using System.Threading.Tasks;
 using CPATapi.Server.Models;
 using Dapper;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.Data.SqlClient;
-using Microsoft.Extensions.Configuration;
 
 namespace CPATapi.Server.Controllers
 {
     [Route("[controller]")]
     [ApiController]
-    public class CallerIdController : ControllerBase
+    public class CallerIdController(IConfiguration config) : ControllerBase
     {
-        private readonly IConfiguration _config;
-        public CallerIdController(IConfiguration config) => _config = config;
-
-
         [HttpGet, Route("{number}")]
         public async Task<TapiContact> CallerIdAsync([FromRoute] string number)
         {
@@ -24,18 +18,19 @@ namespace CPATapi.Server.Controllers
                 number = "%" + minMatch;
             }
 
-            await using var con = new SqlConnection(_config["Db:ConnectionString"]);
+            await using var con = new SqlConnection(config["Db:ConnectionString"]);
             await con.OpenAsync();
 
-            var result = await con.QueryFirstOrDefaultAsync<TapiContact>(@"
-SELECT 
-TD_ID,
-TD_NAME,
-TD_NUMBER,
-TD_NUMBER_TAPI,
-TD_MEDIUM
-FROM dbo.CP_TAPI_DIRECTORY
-WHERE TD_NUMBER_TAPI LIKE @number", new {number});
+            var result = await con.QueryFirstOrDefaultAsync<TapiContact>("""
+                                                                         SELECT 
+                                                                         TD_ID,
+                                                                         TD_NAME,
+                                                                         TD_NUMBER,
+                                                                         TD_NUMBER_TAPI,
+                                                                         TD_MEDIUM
+                                                                         FROM dbo.CP_TAPI_DIRECTORY
+                                                                         WHERE TD_NUMBER_TAPI LIKE @number
+                                                                         """, new {number});
             return result;
         }
     }
diff --git a/server/src/CPATapi.Server/Controllers/ContactController.cs b/server/src/CPATapi.Server/Controllers/ContactController.cs
index 5c4c111..79012f3 100644
--- a/server/src/CPATapi.Server/Controllers/ContactController.cs
+++ b/server/src/CPATapi.Server/Controllers/ContactController.cs
@@ -1,42 +1,32 @@
-using System.Collections.Generic;
-using System.Threading.Tasks;
 using CPATapi.Server.Models;
 using Dapper;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.Data.SqlClient;
-using Microsoft.Extensions.Configuration;
-using Microsoft.Extensions.Logging;
 
 namespace CPATapi.Server.Controllers
 {
     [ApiController]
     [Route("[controller]")]
-    public class ContactController : ControllerBase
+    public class ContactController(ILogger<ContactController> logger, IConfiguration config) : ControllerBase
     {
 
-        private readonly ILogger<ContactController> _logger;
-        private readonly IConfiguration _config;
-
-        public ContactController(ILogger<ContactController> logger, IConfiguration config)
-        {
-            _logger = logger;
-            _config = config;
-        }
+        private readonly ILogger<ContactController> _logger = logger;
 
         [HttpGet]
         public async Task<IEnumerable<TapiContact>> GetAsync()
         {
-            await using var con = new SqlConnection(_config["Db:ConnectionString"]);
+            await using var con = new SqlConnection(config["Db:ConnectionString"]);
             await con.OpenAsync();
 
-            var contacts = await con.QueryAsync<TapiContact>(@"
-SELECT 
-TD_ID,
-TD_NAME,
-TD_NUMBER,
-TD_NUMBER_TAPI,
-TD_MEDIUM
-FROM dbo.CP_TAPI_DIRECTORY");
+            var contacts = await con.QueryAsync<TapiContact>("""
+                                                             SELECT 
+                                                             TD_ID,
+                                                             TD_NAME,
+                                                             TD_NUMBER,
+                                                             TD_NUMBER_TAPI,
+                                                             TD_MEDIUM
+                                                             FROM dbo.CP_TAPI_DIRECTORY
+                                                             """);
             return contacts;
         }
     }
diff --git a/server/src/CPATapi.Server/Controllers/SearchController.cs b/server/src/CPATapi.Server/Controllers/SearchController.cs
index 4526197..9dcd629 100644
--- a/server/src/CPATapi.Server/Controllers/SearchController.cs
+++ b/server/src/CPATapi.Server/Controllers/SearchController.cs
@@ -1,23 +1,16 @@
-using System.Collections.Generic;
-using System.Linq;
 using System.Text;
 using System.Text.RegularExpressions;
-using System.Threading.Tasks;
 using CPATapi.Server.Models;
 using Dapper;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.Data.SqlClient;
-using Microsoft.Extensions.Configuration;
 
 namespace CPATapi.Server.Controllers
 {
     [Route("[controller]")]
     [ApiController]
-    public class SearchController : ControllerBase
+    public class SearchController(IConfiguration config) : ControllerBase
     {
-        private readonly IConfiguration _config;
-        public SearchController(IConfiguration config) => _config = config;
-
         [HttpGet]
         public async Task<IEnumerable<TapiContact>> SearchAsync([FromQuery] string query)
         {
@@ -33,17 +26,18 @@ namespace CPATapi.Server.Controllers
                 return new List<TapiContact>();
             }
 
-            await using var con = new SqlConnection(_config["Db:ConnectionString"]);
+            await using var con = new SqlConnection(config["Db:ConnectionString"]);
             await con.OpenAsync();
-            var sql = new StringBuilder(@"
-SELECT TOP 10
-TD_ID,
-TD_NAME,
-TD_NUMBER,
-TD_NUMBER_TAPI,
-TD_MEDIUM
-FROM dbo.CP_TAPI_DIRECTORY
-WHERE ");
+            var sql = new StringBuilder("""
+                                        SELECT TOP 10
+                                        TD_ID,
+                                        TD_NAME,
+                                        TD_NUMBER,
+                                        TD_NUMBER_TAPI,
+                                        TD_MEDIUM
+                                        FROM dbo.CP_TAPI_DIRECTORY
+                                        WHERE 
+                                        """);
             var first = true;
             var dp = new DynamicParameters();
             for (var i = 1; i <= args.Length; i++)
diff --git a/server/src/CPATapi.Server/Program.cs b/server/src/CPATapi.Server/Program.cs
index bbc9dc4..ceb09d2 100644
--- a/server/src/CPATapi.Server/Program.cs
+++ b/server/src/CPATapi.Server/Program.cs
@@ -1,26 +1,16 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
-using Microsoft.AspNetCore.Hosting;
-using Microsoft.Extensions.Configuration;
-using Microsoft.Extensions.Hosting;
-using Microsoft.Extensions.Logging;
+var builder = WebApplication.CreateBuilder(args);
 
-namespace CPATapi.Server
+builder.Services.AddControllers();
+
+var app = builder.Build();
+
+if (app.Environment.IsDevelopment())
 {
-    public class Program
-    {
-        public static void Main(string[] args)
-        {
-            CreateHostBuilder(args).Build().Run();
-        }
-
-        public static IHostBuilder CreateHostBuilder(string[] args) =>
-            Host.CreateDefaultBuilder(args)
-                .ConfigureWebHostDefaults(webBuilder =>
-                {
-                    webBuilder.UseStartup<Startup>();
-                });
-    }
+    app.UseDeveloperExceptionPage();
 }
+
+app.UseAuthorization();
+
+app.MapControllers();
+
+app.Run();
diff --git a/server/src/CPATapi.Server/Startup.cs b/server/src/CPATapi.Server/Startup.cs
deleted file mode 100644
index 3d9d506..0000000
--- a/server/src/CPATapi.Server/Startup.cs
+++ /dev/null
@@ -1,46 +0,0 @@
-using Microsoft.AspNetCore.Builder;
-using Microsoft.AspNetCore.Hosting;
-using Microsoft.Extensions.Configuration;
-using Microsoft.Extensions.DependencyInjection;
-using Microsoft.Extensions.Hosting;
-
-namespace CPATapi.Server
-{
-    public class Startup
-    {
-        public Startup(IConfiguration configuration)
-        {
-            Configuration = configuration;
-        }
-
-        public IConfiguration Configuration { get; }
-
-        // This method gets called by the runtime. Use this method to add services to the container.
-        public void ConfigureServices(IServiceCollection services)
-        {
-            services
-                .AddControllers();
-                //.AddJsonOptions(options => options.JsonSerializerOptions.PropertyNamingPolicy = null);
-        }
-
-        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
-        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
-        {
-            if (env.IsDevelopment())
-            {
-                app.UseDeveloperExceptionPage();
-            }
-
-            //app.UseHttpsRedirection();
-
-            app.UseRouting();
-
-            app.UseAuthorization();
-
-            app.UseEndpoints(endpoints =>
-            {
-                endpoints.MapControllers();
-            });
-        }
-    }
-}