C#

FileStream fs;
StreamWriter fw;

fs = new FileStream("D:\\Temp\\Programming.txt", FileMode.OpenOrCreate, FileAccess.Write);
fw = new StreamWriter(fs);

fw.WriteLine("C# Programming");
fw.WriteLine("C Programming");
fw.WriteLine("C++ Programming");

fw.Close();
fs.Close();

using (FileStream fs = new FileStream("D:\\Temp\\Programming.txt", FileMode.OpenOrCreate, FileAccess.Write))
    {
    using (StreamWriter fw = new StreamWriter(fs))
        {
        fw.WriteLine("C# Programming");
        fw.WriteLine("C Programming");
        fw.WriteLine("C++ Programming");
        }
    }

eso0o wrote:

plz tell me i needed it very soon

private void load_customers()
{

    lv_customers.Items.Clear();

    // How to use Entity Framework, that's the question
    // I'm using LINQ here to specify the data, and not Entity Framework

    // Basic LINQ Query Operation
    // <a href="https://msdn.microsoft.com/en-us/library/bb397927.aspx">https://msdn.microsoft.com/en-us/library/bb397927.aspx</a>

    using (StoreContext context = new StoreContext())
    {
        var query =
            from customer in context.Customers
            where customer.FirstName == "Randy" || customer.LastName == "Sublett"
            orderby customer.FirstName
            select new
            {
                ID = customer.ID,
                FirstName = customer.FirstName,
                LastName = customer.LastName,
                BusinessName = customer.BusinessName
            };                   

        foreach(var ci in query)
        {
           ListViewItem item = new ListViewItem(ci.ID.ToString(), 0);
           item.SubItems.Add(ci.FirstName);
           item.SubItems.Add(ci.LastName);
           item.SubItems.Add(ci.BusinessName);
           item.SubItems.Add(0.ToString());

           lv_customers.Items.Add(item);

           Application.DoEvents();
        }

   }

}

Coder For Hire wrote:

I'm not trying to change the struct, I'm try to change the departmentId.

ECMA 334, §14.5.4 Member access:

... if E is a property or indexer access, then the value of the property or indexer access is obtained
(§14.1.1) and E is reclassified as a value.

ECMA 334, §18.3.3 Assignment:

When a property or indexer of a struct is the target of an assignment, the instance expression associated with
the property or indexer access shall be classified as a variable. If the instance expression is classified as a
value, a compile-time error occurs. This is described in further detail in §14.14.1.

public class Employee
    {
    private Department _TheDepartment;
    public Department TheDepartment
        {
        get { return _TheDepartment; }
        set { _TheDepartment = value; }
        }
    public Employee()
        {
        _TheDepartment.DepartmentId = 100;
        }
    }

public struct Department
    {
    public int DepartmentId { get; set; }
    }

namespace Sanebox2
{
    public class Employee
    {
        public Department TheDepartment { get; set; }

        public Employee(int departmentid = 100)
        {
            TheDepartment = new Department(departmentid);
        }
    }

    public struct Department
    {
        public int DepartmentId { get; set; }

        public Department(int id) : this()
        {
            DepartmentId = id;
        }
    }
}

// test somewhere in a method or event-handler, set break-point, examine 'e1, 'e2
// Employee e1 = new Employee();
// Employee e2 = new Employee(999);

TheDepartment = new Department { DepartmentId = departmentId };

• All fields in a struct have to be assigned by a constructor before the constructor can call a method in the struct.
• Setting a property counts as calling a method on the struct, which you can't do until all of the fields have been assigned.
• Since you're using an automatic property, you can't directly access the backing field to initialize it.
• Therefore, the only way to initialize the field is to call the default parameterless constructor first.

using (WebClient client = new WebClient())
{

    client.DownloadProgressChanged += (sender, e) =>
    {
        double bytesIn = double.Parse(e.BytesReceived.ToString());
        double totalBytes = double.Parse(e.TotalBytesToReceive.ToString());
        double percentage = bytesIn / totalBytes * 100;

        file.PercentDone = Math.Truncate(percentage);
    };

    client.DownloadFileCompleted += (sender, e) =>
    {
        Files.Remove(file);
    };

    await client.DownloadFileTaskAsync(new Uri(file.FileName), outputFile);
}