I think you might want to be a software developer for a long time, in the same way that some people are musicians for a long time, or artists for a long time, or roofers for a long time. If not, you can hit “back” in your browser. It’s cool, no harm no foul. But I think maybe you would like to be a twenty-year programmer, or forty-year, or more.
dynamic excel = Activator.CreateInstance(Type.GetTypeFromProgID("Excel.Application", true));
excel.Visible = true;
Console.WriteLine("Press Enter to close Excel.");
Console.ReadLine();
excel.Quit(); System.__ComObject does not contain a definition for 'Visible'
using Excel = Microsoft.Office.Interop.Excel;
// ...
var excel = new Excel.Application();
excel.Visible = true;
Console.WriteLine("Press Enter to close Excel.");
Console.ReadLine();
excel.Quit(); <ItemGroup>
<Reference Include="Interop.WIA">
<HintPath>..\DNTScanner.Core.TypeLibrary\bin\Debug\Interop.WIA.dll</HintPath>
<EmbedInteropTypes>True</EmbedInteropTypes>
</Reference>
</ItemGroup> <ItemGroup Condition=" '$(TargetFramework)' == 'net40' ">
<Reference Include="Microsoft.CSharp" />
</ItemGroup>
<ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
<PackageReference Include="Microsoft.CSharp" Version="4.5.0" />
</ItemGroup> <Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>netcoreapp3.0</TargetFramework>
</PropertyGroup>
<!--
The following 'COMReference' items were copied from a .NET Framework project.
They were added by using the Visual Studio COM References window.
See https://docs.microsoft.com/en-us/visualstudio/ide/managing-references-in-a-project?view=vs-2017.
Observe the 'EmbedInteropTypes' tag value.
See https://docs.microsoft.com/en-us/visualstudio/msbuild/common-msbuild-project-items?view=vs-2017#comreference
-->
<ItemGroup>
<COMReference Include="Microsoft.Office.Core">
<Guid>{2DF8D04C-5BFA-101B-BDE5-00AA0044DE52}</Guid>
<VersionMajor>2</VersionMajor>
<VersionMinor>8</VersionMinor>
<Lcid>0</Lcid>
<WrapperTool>primary</WrapperTool>
<Isolated>False</Isolated>
<EmbedInteropTypes>True</EmbedInteropTypes>
</COMReference>
<COMReference Include="Microsoft.Office.Interop.Excel">
<Guid>{00020813-0000-0000-C000-000000000046}</Guid>
<VersionMajor>1</VersionMajor>
<VersionMinor>9</VersionMinor>
<Lcid>0</Lcid>
<WrapperTool>primary</WrapperTool>
<Isolated>False</Isolated>
<EmbedInteropTypes>True</EmbedInteropTypes>
</COMReference>
<COMReference Include="VBIDE">
<Guid>{0002E157-0000-0000-C000-000000000046}</Guid>
<VersionMajor>5</VersionMajor>
<VersionMinor>3</VersionMinor>
<Lcid>0</Lcid>
<WrapperTool>primary</WrapperTool>
<Isolated>False</Isolated>
<EmbedInteropTypes>True</EmbedInteropTypes>
</COMReference>
</ItemGroup>
</Project> using System;
using System.Reflection;
using Excel = Microsoft.Office.Interop.Excel;
namespace ExcelDemo
{
class Program
{
public static void Main(string[] args)
{
Excel.Application excel;
Excel.Workbook workbook;
Excel.Worksheet sheet;
Excel.Range range;
try
{
// Start Excel and get Application object.
excel = new Excel.Application();
excel.Visible = true;
// Get a new workbook.
workbook = excel.Workbooks.Add(Missing.Value);
sheet = (Excel.Worksheet)workbook.ActiveSheet;
// Add table headers going cell by cell.
sheet.Cells[1, 1] = "First Name";
sheet.Cells[1, 2] = "Last Name";
sheet.Cells[1, 3] = "Full Name";
sheet.Cells[1, 4] = "Salary";
// Format A1:D1 as bold, vertical alignment = center.
sheet.get_Range("A1", "D1").Font.Bold = true;
sheet.get_Range("A1", "D1").VerticalAlignment =
Excel.XlVAlign.xlVAlignCenter;
// Create an array to multiple values at once.
string[,] saNames = new string[5, 2];
saNames[0, 0] = "John";
saNames[0, 1] = "Smith";
saNames[1, 0] = "Tom";
saNames[1, 1] = "Brown";
saNames[2, 0] = "Sue";
saNames[2, 1] = "Thomas";
saNames[3, 0] = "Jane";
saNames[3, 1] = "Jones";
saNames[4, 0] = "Adam";
saNames[4, 1] = "Johnson";
// Fill A2:B6 with an array of values (First and Last Names).
sheet.get_Range("A2", "B6").Value2 = saNames;
// Fill C2:C6 with a relative formula (=A2 & " " & B2).
range = sheet.get_Range("C2", "C6");
range.Formula = "=A2 & \" \" & B2";
// Fill D2:D6 with a formula(=RAND()*100000) and apply format.
range = sheet.get_Range("D2", "D6");
range.Formula = "=RAND()*100000";
range.NumberFormat = "$0.00";
// AutoFit columns A:D.
range = sheet.get_Range("A1", "D1");
range.EntireColumn.AutoFit();
// Make sure Excel is visible and give the user control
// of Microsoft Excel's lifetime.
excel.Visible = true;
excel.UserControl = true;
}
catch (Exception e)
{
Console.WriteLine($"Error: {e.Message} Line: {e.Source}");
}
}
}
} 
Visual Studio for Mac has parted ways with the Mono runtime in the just-published Preview 5, now running on .NET 6.
ASP.NET 5 beta7 is now available both on NuGet and as a tooling update to Visual Studio 2015! This release also includes the first public preview of the .NET Execution Environment (DNX) for Mac and Linux based on .NET Core – no Mono required.
There has never been a better time to be a .NET developer, you can now build Android, iOS, Linux, Mac, and Windows applications with .NET all in Open Source. In this session we will run through some of the new innovations including the .NET Framework updates, .NET Standard, Universal Windows Platform updates, .NET Core, managed languages and more. We will also review the updates to Visual Studio and Visual Studio Code to make you a better developer, come see some of the latest productivity features in these tools including managing code style, searching your source and more.
Short Bytes: Web graphics have come a long way from the time images were the only graphics on mostly static pages, to WebGL’s powerful animation, GPU and gaming capabilities, all powered by canvas HTML element’s 2D and 3D contexts. Now Webkit browser engine has proposed a new low level web graphics API standard to leverage the computing powers and hardware acceleration that latest GPU systems provide
Visual Studio 2022 now available
Microsoft.Identity.Web is now generally available!
