diff --git a/BarcodeXlsx/BarcodeXlsx.csproj b/BarcodeXlsx/BarcodeXlsx.csproj
index 98ab8b8..e192604 100644
--- a/BarcodeXlsx/BarcodeXlsx.csproj
+++ b/BarcodeXlsx/BarcodeXlsx.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net7.0</TargetFramework>
     <ApplicationIcon />
     <Win32Resource />
     <StartupObject />
diff --git a/Common/Common.csproj b/Common/Common.csproj
index e278340..150d6a1 100644
--- a/Common/Common.csproj
+++ b/Common/Common.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net7.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/barcode/barcode.csproj b/barcode/barcode.csproj
index 5560594..b5f2efd 100644
--- a/barcode/barcode.csproj
+++ b/barcode/barcode.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net7.0</TargetFramework>
     <AspNetCoreHostingModel>InProcess</AspNetCoreHostingModel>
     <DockerDefaultTargetOS>Windows</DockerDefaultTargetOS>
     <UserSecretsId>48b2a1da-1f8e-4230-b5f8-5dd9d113a1a6</UserSecretsId>
diff --git a/barcode3/barcode3.csproj b/barcode3/barcode3.csproj
index c5a43e2..47c1fc3 100644
--- a/barcode3/barcode3.csproj
+++ b/barcode3/barcode3.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net7.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/barcode3/wwwroot/barcodesample.xlsx b/barcode3/wwwroot/barcodesample.xlsx
new file mode 100644
index 0000000..9e7254d
--- /dev/null
+++ b/barcode3/wwwroot/barcodesample.xlsx
Binary files differ