implement initialize pattern

Author: SimonCropp

src/Directory.Build.props

@@ -2,7 +2,7 @@
 <Project>
   <PropertyGroup>
     <NoWarn>CS1591;CS0649</NoWarn>
-    <Version>4.0.1</Version>
+    <Version>4.1.0</Version>
     <ImplicitUsings>enable</ImplicitUsings>
     <AssemblyVersion>1.0.0</AssemblyVersion>
     <PackageTags>ImageSharp, Verify</PackageTags>

src/Tests/ModuleInit.cs

@@ -7,8 +7,4 @@ public static void Init() =>
         VerifyImageSharp.Initialize();
 
     #endregion
-
-    [ModuleInitializer]
-    public static void InitOther() =>
-        VerifyImageSharp.Initialize();
 }

src/Verify.ImageSharp/VerifyImageSharp.cs

@@ -10,8 +10,17 @@ namespace VerifyTests;
 
 public static class VerifyImageSharp
 {
+    public static bool Initialized { get; private set; }
+
     public static void Initialize()
     {
+        if (Initialized)
+        {
+            throw new("Already Initialized");
+        }
+
+        Initialized = true;
+
         InnerVerifier.ThrowIfVerifyHasBeenRun();
         VerifierSettings.RegisterFileConverter("bmp", ConvertBmp);
         VerifierSettings.RegisterFileConverter("gif", ConvertGif);