diff --git a/Other/Resources/Changelog/v3.3.14.md b/Other/Resources/Changelog/v3.3.14.md
index b101b1d9..47a2fb80 100644
--- a/Other/Resources/Changelog/v3.3.14.md
+++ b/Other/Resources/Changelog/v3.3.14.md
@@ -3,4 +3,4 @@
 ## Changes
 
 - Forced repositories to have a changelog.
-- Added changelog as release-notes to github-release
+- Added changelog as release-notes to GitHub-release.
diff --git a/Other/Resources/Changelog/v3.3.15.md b/Other/Resources/Changelog/v3.3.15.md
new file mode 100644
index 00000000..71ab70b3
--- /dev/null
+++ b/Other/Resources/Changelog/v3.3.15.md
@@ -0,0 +1,6 @@
+# Release notes
+
+## Changes
+
+- The `bin`- and `obj`-folder for .NET-builds will now be removed before the project will be built.
+- Added `t4_transform`
diff --git a/ScriptCollection/ScriptCollection.codeunit.xml b/ScriptCollection/ScriptCollection.codeunit.xml
index 222f0df6..39c8243d 100644
--- a/ScriptCollection/ScriptCollection.codeunit.xml
+++ b/ScriptCollection/ScriptCollection.codeunit.xml
@@ -2,7 +2,7 @@
 <codeunit:codeunit xmlns:codeunit="https://github.com/anionDev/ProjectTemplates" codeunitspecificationversion="1.1.0"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="https://raw.githubusercontent.com/anionDev/ProjectTemplates/main/Templates/Conventions/RepositoryStructure/CommonProjectStructure/codeunit.xsd">
     <codeunit:name>ScriptCollection</codeunit:name>
-    <codeunit:version>3.3.14</codeunit:version>
+    <codeunit:version>3.3.15</codeunit:version>
     <codeunit:minimalcodecoverageinpercent>30</codeunit:minimalcodecoverageinpercent>
     <codeunit:dependentcodeunits></codeunit:dependentcodeunits>
 </codeunit:codeunit>
\ No newline at end of file
diff --git a/ScriptCollection/ScriptCollection/ScriptCollectionCore.py b/ScriptCollection/ScriptCollection/ScriptCollectionCore.py
index 9cc2526c..29db333f 100644
--- a/ScriptCollection/ScriptCollection/ScriptCollectionCore.py
+++ b/ScriptCollection/ScriptCollection/ScriptCollectionCore.py
@@ -25,7 +25,7 @@
 from .ProgramRunnerEpew import ProgramRunnerEpew, CustomEpewArgument
 
 
-version = "3.3.14"
+version = "3.3.15"
 __version__ = version
 
 
diff --git a/ScriptCollection/ScriptCollection/TasksForCommonProjectStructure.py b/ScriptCollection/ScriptCollection/TasksForCommonProjectStructure.py
index 0b5f3bc2..452b783d 100644
--- a/ScriptCollection/ScriptCollection/TasksForCommonProjectStructure.py
+++ b/ScriptCollection/ScriptCollection/TasksForCommonProjectStructure.py
@@ -300,6 +300,17 @@ def update_version_of_codeunit_to_project_version(self, common_tasks_file: str,
         codeunit_file: str = os.path.join(GeneralUtilities.resolve_relative_path("..", os.path.dirname(common_tasks_file)), f"{codeunit_name}.codeunit.xml")
         self.write_version_to_codeunit_file(codeunit_file, current_version)
 
+    @GeneralUtilities.check_arguments
+    def t4_transform(self, commontasks_script_file_of_current_file: str, verbosity: int):
+        sc = ScriptCollectionCore()
+        codeunit_folder: str = str(Path(os.path.dirname(commontasks_script_file_of_current_file)).parent.absolute())
+        codeunitname: str = os.path.basename(str(Path(os.path.dirname(commontasks_script_file_of_current_file)).parent.absolute()))
+        csproj_folder = os.path.join(codeunit_folder, codeunitname)
+        for search_result in Path(csproj_folder).glob('**/*.tt'):
+            tt_file = str(search_result)
+            relative_path_to_tt_file = str(Path(tt_file).relative_to(Path(csproj_folder)))
+            sc.run_program("texttransform", relative_path_to_tt_file, csproj_folder, verbosity=verbosity)
+
     @GeneralUtilities.check_arguments
     def standardized_tasks_generate_reference_by_docfx(self, generate_reference_script_file: str, verbosity: int, targetenvironmenttype: str, commandline_arguments: list[str]) -> None:
         verbosity = TasksForCommonProjectStructure.get_verbosity_from_commandline_arguments(commandline_arguments,  verbosity)
@@ -321,6 +332,8 @@ def __standardized_tasks_build_for_dotnet_build(self, csproj_file: str, buildcon
             csproj_file_folder = os.path.dirname(csproj_file)
             csproj_file_name = os.path.basename(csproj_file)
             self.__sc.run_program("dotnet", "clean", csproj_file_folder, verbosity=verbosity)
+            GeneralUtilities.ensure_directory_does_not_exist(os.path.join(csproj_file_folder, "bin"))
+            GeneralUtilities.ensure_directory_does_not_exist(os.path.join(csproj_file_folder, "obj"))
             GeneralUtilities.ensure_directory_does_not_exist(outputfolder)
             GeneralUtilities.ensure_directory_exists(outputfolder)
             # TODO pass commitid, timestamp and if desired something like keypair, certificate to the src-code
@@ -943,6 +956,14 @@ def do_npm_install(self, package_json_folder: str, verbosity: int):
         sc.program_runner = ProgramRunnerEpew()
         sc.run_program("npm", "install", package_json_folder, verbosity=verbosity)
 
+    @GeneralUtilities.check_arguments
+    def generate_openapi_file(self, buildscript_file: str, runtime: str) -> None:
+        codeunitname = os.path.basename(str(Path(os.path.dirname(buildscript_file)).parent.parent.absolute()))
+        repository_folder = str(Path(os.path.dirname(buildscript_file)).parent.parent.parent.absolute())
+        artifacts_folder = os.path.join(repository_folder, codeunitname, "Other", "Artifacts")
+        sc = ScriptCollectionCore()
+        sc.run_program("swagger", f"tofile --output APISpecification\\{codeunitname}.api.json BuildResult_DotNet_{runtime}\\{codeunitname}.dll v1", artifacts_folder)
+
     @GeneralUtilities.check_arguments
     def replace_version_in_package_file(self: ScriptCollectionCore, package_json_file: str, version: str):
         filename = package_json_file
diff --git a/ScriptCollection/pyproject.toml b/ScriptCollection/pyproject.toml
index 3d6355d1..105be995 100644
--- a/ScriptCollection/pyproject.toml
+++ b/ScriptCollection/pyproject.toml
@@ -5,7 +5,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "ScriptCollection"
 dynamic = ["readme"]
-version = "3.3.14"
+version = "3.3.15"
 authors = [
   { name="Marius Göcke", email="marius.goecke@gmail.com" },
 ]