diff --git a/Sources/Console/Console.csproj b/Sources/Console/Console.csproj
index 390a34e..2645986 100644
--- a/Sources/Console/Console.csproj
+++ b/Sources/Console/Console.csproj
@@ -1,7 +1,10 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <OutputType>Exe</OutputType>
+	<TargetFrameworks>net7.0-android</TargetFrameworks>
+	<TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">$(TargetFrameworks);net7.0-windows10.0.19041.0</TargetFrameworks>
+	<TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('ios'))">$(TargetFrameworks);net7.0-ios</TargetFrameworks>
+	<TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('maccatalyst'))">$(TargetFrameworks);net7.0-maccatalyst</TargetFrameworks>
     <TargetFramework>net7.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
diff --git a/Sources/Modèle/Modèle.csproj b/Sources/Modèle/Modèle.csproj
index 4658cbf..21d943f 100644
--- a/Sources/Modèle/Modèle.csproj
+++ b/Sources/Modèle/Modèle.csproj
@@ -1,6 +1,10 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
+	<TargetFrameworks>net7.0-android</TargetFrameworks>
+	<TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">$(TargetFrameworks);net7.0-windows10.0.19041.0</TargetFrameworks>
+	<TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('ios'))">$(TargetFrameworks);net7.0-ios</TargetFrameworks>
+	<TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('maccatalyst'))">$(TargetFrameworks);net7.0-maccatalyst</TargetFrameworks>
     <TargetFramework>net7.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
diff --git a/Sources/Modèle/MonsterBase.cs b/Sources/Modèle/MonsterBase.cs
index f6f2470..f3ae6af 100644
--- a/Sources/Modèle/MonsterBase.cs
+++ b/Sources/Modèle/MonsterBase.cs
@@ -12,7 +12,7 @@ namespace Modèle
     /// </summary>
     public class MonsterBase : IRechercheMonstre
     {
-        private List<Monstre> monsters;
+        private List<Monstre> monsters = null!;
         public List<Monstre> ListMonsters
         {
             get
diff --git a/Sources/Modèle/Monstre.cs b/Sources/Modèle/Monstre.cs
index 0b92755..7167097 100644
--- a/Sources/Modèle/Monstre.cs
+++ b/Sources/Modèle/Monstre.cs
@@ -9,7 +9,7 @@ public class Monstre
     public string Name { get; set; }
     public string Description { get; set; } = string.Empty;
     
-    private List<string> characteristic;
+    private List<string> characteristic = null!;
     public List<string> CharacteristicsList
     {
         get {
@@ -20,7 +20,7 @@ public class Monstre
         }
     }
     
-    private List<string> appearance;
+    private List<string> appearance = null!;
     public List<string> AppearanceList
     {
         get