C#

public void MethodName(ObservableCollection<DataCollection> dataCollection)
    {
        if (dataCollection != null)
        {
            IsChecked = dataCollection.Any(o => o.DataCollectionID.Equals(30));

            IsChecked = dataCollection.Where(o => o.DataCollectionID.Equals(30)).Count() > 0;
        }
    }

Can anyone explain me, what could be the most efficient way to use from above two filtering? .Any? or .Where.Count?

Note: Consider that dataCollection has over 10,000 items.

Please advice me. Thank you

private static void Main(string[] args)
{
    byte[] buffer = new byte[1 << 20]; //1MB
    Random r = new Random();

    for (int mb = 1024; mb <= 8192; mb += 1024)
    {
        using (FileStream fs = File.Create(string.Format(@"c:\temp\GB{0}.dat", mb >> 10)))
        {
            for (long index = 0; index < mb; index++)
            {
                r.NextBytes(buffer);
                fs.Write(buffer, 0, buffer.Length);
            }
        }
    }
}

private static void Main(string[] args)
{
    byte[] buffer = new byte[1 << 20]; //1MB
    Random r = new Random();

    for (int mb = 1024; mb <= 8192; mb += 1024)
    {
        Console.Write("GB{0}.dat: ", mb >> 10);
        Stopwatch sw = Stopwatch.StartNew();
        using (FileStream fs = File.Open(string.Format(@"c:\temp\GB{0}.dat", mb >> 10), FileMode.Open))
        {
            for (long index = 0; index < mb; index++)
            {
                fs.Read(buffer, 0, buffer.Length);
            }
        }
        Console.WriteLine("{0:0.00}s, {1:0.00}MB/s", sw.ElapsedMilliseconds / 1000d, mb * 1000d / sw.ElapsedMilliseconds);
    }
}

GB1.dat: 17.54s, 58.38MB/s
GB2.dat: 39.20s, 52.25MB/s
GB3.dat: 149.56s, 20.54MB/s
GB4.dat: 92.97s, 44.06MB/s
GB5.dat: 175.25s, 29.22MB/s
GB6.dat: 84.29s, 72.90MB/s
GB7.dat: 104.96s, 68.29MB/s
GB8.dat: 179.43s, 45.66MB/s

I have a multiproject  c# solution which builds in VS2013 on my local machine. When
I do TFS MSBuild in fires the following error:

It's a just a _default. aspx page
<i>The type or namespace name 'Class1' could not be found (are you missing a using directive or an assembly reference?)</i>

What surprises me is that it has no external references and it's calling a class in the same namespace but in another file.

default.apx:

<i><%@ Page Language="C#" AutoEventWireup="true" CodeFile="default.aspx.cs" Inherits="MyProject.Service.Proxy._default"   %>
</i>

default.aspx.cs:
namespace MyProject.Service.Proxy
{

  public partial class _default : System.Web.UI.Page
    {
     protected void Page_Load(object sender, EventArgs e)
        {
            var a = new Class1();
            ......
        }
    }
}

class1.cs:
<i>namespace MyProject.Service.Proxy
{
    public class Class1
    {
        public int Number { get; set; }

        public Class1()
        {
            Number = 1;

        }
    }
}
</i>

As you can see all classes and files are in the very same namespace.


But if I write the Class1 code in default.aspx.cs IT WORKS!

<i>namespace MyProject.Service.Proxy
{
   public class Class1
   {
      public int Number { get; set; }

      public Class1()
      {
          Number = 1;
      }
  }

  public partial class _default : System.Web.UI.Page
    {
     protected void Page_Load(object sender, EventArgs e)
        {
            var a = new Class1();
            ......
        }
    }
}
</i>
I wouldn't like to end up having a too long and unreadable default.aspx.cs
Do you have any clue what I'm doing wrong?
Thanks so much