Projektdateien hinzufügen.

FIX6_IHAS_PROPERTIES_README.md

@@ -0,0 +1,75 @@
+# FIX6 – `ihas.properties` next to `IMSApiDotNet.dll`
+
+FIX6 extends FIX5 without changing the public legacy ABI.
+
+## Property precedence
+
+The shared `IMSApiDotNetBase` implementation (therefore both `net48` and `netstandard2.0`) resolves a property in this order:
+
+1. `IMSApiDotNet.setProperty(key, value)` / `IMSApiDotNetBase.setProperty(key, value)`
+2. `ihas.properties`
+3. fallback/default value used by the caller
+
+## Required file location
+
+`ihas.properties` must be placed in the **same directory as the actually loaded `IMSApiDotNet.dll`**.
+
+Example deployment:
+
+```text
+MyApplication\
+|-- MyApplication.exe
+|-- IMSApiDotNet.dll
+`-- ihas.properties
+```
+
+For example:
+
+```properties
+itac.artes.clusternodes=https://partner.itacsoftware.com:8181/mes
+```
+
+The DLL determines its own location through `typeof(IMSApiDotNetBase).Assembly.Location` and loads:
+
+```text
+<Path of loaded IMSApiDotNet.dll>\ihas.properties
+```
+
+The current working directory is **not** used for normal lookup. `itac.propdir` remains an accepted legacy property but no longer redirects the physical `ihas.properties` file location. This prevents a service, console application, IIS host, scheduler, or other host process from accidentally loading a different file because its working directory differs from the DLL directory.
+
+If `Assembly.Location` is unavailable in a special hosting scenario, `AppContext.BaseDirectory` is used as the runtime fallback.
+
+## File syntax
+
+- Empty lines are ignored.
+- Lines beginning with `#` are ignored.
+- Values use `key=value` syntax.
+- Key and value are trimmed.
+
+Example:
+
+```properties
+itac.appid=MyApplication
+itac.artes.clusternodes=https://partner.itacsoftware.com:8181/mes
+itac.artes.connection.timeout=30000
+itac.artes.ihas.failover=true
+```
+
+Programmatic values still override the file:
+
+```csharp
+IMSApiDotNet.setProperty("itac.appid", "RuntimeOverride");
+var api = IMSApiDotNet.loadLibrary();
+api.imsapiInit();
+```
+
+## Verification
+
+Run:
+
+```powershell
+.\scripts\check-ihas-properties.ps1
+.\scripts\check-legacy-binary-compat.ps1
+```
+
+The property test deliberately changes the process working directory and sets `itac.propdir` to a different directory containing a conflicting file. The test succeeds only when the file next to the loaded `IMSApiDotNet.dll` is used. The legacy binary compatibility test remains unchanged.