diff --git a/bin/csharp-petstore.sh b/bin/csharp-petstore.sh
index b9e8feabae6..232f706b7fd 100755
--- a/bin/csharp-petstore.sh
+++ b/bin/csharp-petstore.sh
@@ -26,6 +26,6 @@ fi
 
 # if you've executed sbt assembly previously it will use that instead.
 export JAVA_OPTS="${JAVA_OPTS} -XX:MaxPermSize=256M -Xmx1024M -DloggerPath=conf/log4j.properties"
-ags="generate $@ -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l csharp -o samples/client/petstore/csharp/SwaggerClient"
+ags="generate $@ -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l csharp -o samples/client/petstore/csharp/SwaggerClient --additional-properties packageGuid={321C8C3F-0156-40C1-AE42-D59761FB9B6C}"
 
 java $JAVA_OPTS -jar $executable $ags
diff --git a/bin/csharp-property-changed-petstore.sh b/bin/csharp-property-changed-petstore.sh
index 5ee675b3155..bade3670671 100755
--- a/bin/csharp-property-changed-petstore.sh
+++ b/bin/csharp-property-changed-petstore.sh
@@ -26,6 +26,6 @@ fi
 
 # if you've executed sbt assembly previously it will use that instead.
 export JAVA_OPTS="${JAVA_OPTS} -XX:MaxPermSize=256M -Xmx1024M -DloggerPath=conf/log4j.properties"
-ags="generate $@ -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l csharp -o samples/client/petstore/csharp/SwaggerClientWithPropertyChanged --additional-properties=generatePropertyChanged=true"
+ags="generate $@ -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l csharp -o samples/client/petstore/csharp/SwaggerClientWithPropertyChanged --additional-properties=generatePropertyChanged=true,packageGuid={5CD900DE-8266-412F-A758-28E1F9C623D5}"
 
 java $JAVA_OPTS -jar $executable $ags
diff --git a/bin/windows/csharp-petstore-netstandard.bat b/bin/windows/csharp-petstore-netstandard.bat
index 20ef57a8922..4e92f348a49 100644
--- a/bin/windows/csharp-petstore-netstandard.bat
+++ b/bin/windows/csharp-petstore-netstandard.bat
@@ -5,6 +5,6 @@ If Not Exist %executable% (
 )
 
 REM set JAVA_OPTS=%JAVA_OPTS% -Xmx1024M
-set ags=generate -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l csharp -o samples\client\petstore\csharp\SwaggerClientNetStandard --additional-properties targetFramework=v5.0
+set ags=generate -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l csharp -o samples\client\petstore\csharp\SwaggerClientNetStandard --additional-properties targetFramework=v5.0,packageGuid={3AB1F259-1769-484B-9411-84505FCCBD55}
 
 java %JAVA_OPTS% -jar %executable% %ags%
diff --git a/bin/windows/csharp-petstore.bat b/bin/windows/csharp-petstore.bat
index 77493d69ae7..5cbb6804898 100755
--- a/bin/windows/csharp-petstore.bat
+++ b/bin/windows/csharp-petstore.bat
@@ -5,6 +5,6 @@ If Not Exist %executable% (
 )
 
 REM set JAVA_OPTS=%JAVA_OPTS% -Xmx1024M
-set ags=generate -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l csharp -o samples\client\petstore\csharp\SwaggerClient
+set ags=generate -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l csharp -o samples\client\petstore\csharp\SwaggerClient --additional-properties packageGuid={321C8C3F-0156-40C1-AE42-D59761FB9B6C}
 
 java %JAVA_OPTS% -jar %executable% %ags%