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To add to what Freak30 has said I would also have a look at this
XML Serialization and Deserialization: Part-1[^]
It will save you half the work on firstly importing it to a dataset and then to a list.
Every day, thousands of innocent plants are killed by vegetarians.
Help end the violence EAT BACON
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In WPF I have 3 calls to the database and a process that requires the results of these 3 call to complete. Currently I chain the calls and then call the processing method.
If I used an array of 3 tasks and initiating the processing method after Task.AwaitAll, would this achieve the same result as the chaining.
I know I can test this but I'm still reading and trying to relate this to actual issues.
Never underestimate the power of human stupidity
RAH
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It depends, but since you haven't shown your code that sets up the Tasks, it's pretty much just a guess at what you're really doing.
But, if none of the Tasks are waiting on each other, then all the Tasks will execute separately and at the same time. Task.WaitAll() will wait for all of the Tasks to complete.
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I did not have any code to show as I was still reading the docs, just trying to relate to an actual issue I have.
Dave Kreskowiak wrote: Task.WaitAll() will wait for all of the Tasks to complete
So I tried this with asynch Silverlight calls to the wcf 
It had a number of issues around INotifyPropertyChanged which was used in the called process so I need to do some more reading and work out the best way to implement it.
Never underestimate the power of human stupidity
RAH
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I use it in an a lot of places in my database access...
The only thing is important that the 3 calls must have to be unrelated...
Otherwise it can be a very good way to improve performance...
Skipper: We'll fix it.
Alex: Fix it? How you gonna fix this?
Skipper: Grit, spit and a whole lotta duct tape.
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Kornfeld Eliyahu Peter wrote: The only thing is important that the 3 calls must have to be unrelated
Define unrelated, I would expect to use it where I have multiple selects when opening a view but would never use it when inserting/updating multiple records.
The selects would be on different but related tables I don't see this as a problem.
Never underestimate the power of human stupidity
RAH
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In this context unrelated means that the outcome of one call does not effect the others...Which you say no...
Skipper: We'll fix it.
Alex: Fix it? How you gonna fix this?
Skipper: Grit, spit and a whole lotta duct tape.
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As I understand your post, currently you have 3 awaitable calls which you are chaining to execute one after another in your processing method and awaiting the processing method.
If my understanding is correct, I think the array of tasks with Task.WaitAll() should perform better.
And I think you meant Task.WaitAll(). 
Your time will come, if you let it be right.
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You are correct, for some reason I have Await stuck in my head and that is what comes out the fingers - then I get annoyed with intellisense when it does not know what I want.
Never underestimate the power of human stupidity
RAH
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For .NET 4.5 with async / await, using await Task.WhenAll(tasks); is better than using Task.WaitAll(tasks);. The former releases the current thread until the tasks are complete; the latter blocks the current thread waiting for the tasks to complete.
Task.WhenAll method[^]
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Did not know that, thanks! 
Your time will come, if you let it be right.
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Hi,
some month ago, google have deprecate the 2nd version of "Google Calendar API", and my windows application stop to work.
Now I start to rewrote the code, but i discover a surprise, to add, delete, modify, list the appointments in 10 different google calendar, i need to do the authentication with OAuth2.0. And now appear the problem, I have stressed google to find an example of code, but every code was write for webapplication(asp.net) and not for a standalone windows application.
Somebody can help me to find a solution/example to integrate in my code????
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Hi,
I need to add rows in datagridview in Visual Studio in design mode (not programmatically), how can I add rows this way? I was able to add columns but not rows?
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You don't.
Adding data to the DataSource, usually a DataTable, is a run-time thing.
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Thanks for clearing that up.
Do you know why they would allow you to add columns via design mode?
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Thank you.
I cannot get anything to work to add the code at runtime, besides having a button click add row by row (which I do not want and cannot use) so somehow I've done something in the beginning to break it in trying to figure this out, and now that I've asked for help and gotten working examples, it is thwarting my ability to get it to work properly.
Even the code from the msdn site isn't working and my data grid is indeed called dataGridView1?
[code]
private void Form1_Load(object sender, EventArgs e)
{
InitializeDataGridView();
}
private void InitializeDataGridView()
{
// Create an unbound DataGridView by declaring a column count.
dataGridView1.ColumnCount = 4;
dataGridView1.ColumnHeadersVisible = true;
// Set the column header style.
DataGridViewCellStyle columnHeaderStyle = new DataGridViewCellStyle();
columnHeaderStyle.BackColor = Color.Beige;
columnHeaderStyle.Font = new Font("Verdana", 10, FontStyle.Bold);
dataGridView1.ColumnHeadersDefaultCellStyle = columnHeaderStyle;
// Set the column header names.
dataGridView1.Columns[0].Name = "Recipe";
dataGridView1.Columns[1].Name = "Category";
dataGridView1.Columns[2].Name = "Main Ingredients";
dataGridView1.Columns[3].Name = "Rating";
// Populate the rows.
string[] row1 = new string[] { "Meatloaf", "Main Dish", "ground beef",
"**" };
string[] row2 = new string[] { "Key Lime Pie", "Dessert",
"lime juice, evaporated milk", "****" };
string[] row3 = new string[] { "Orange-Salsa Pork Chops", "Main Dish",
"pork chops, salsa, orange juice", "****" };
string[] row4 = new string[] { "Black Bean and Rice Salad", "Salad",
"black beans, brown rice", "****" };
string[] row5 = new string[] { "Chocolate Cheesecake", "Dessert",
"cream cheese", "***" };
string[] row6 = new string[] { "Black Bean Dip", "Appetizer",
"black beans, sour cream", "***" };
object[] rows = new object[] { row1, row2, row3, row4, row5, row6 };
foreach (string[] rowArray in rows)
{
dataGridView1.Rows.Add(rowArray);
}
}
[/code]
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Sigh ... got it.
For some reason (this has happened a few times before) when I copy from the net
private void Form1_Load(object sender, EventArgs e)
{
// something
}
Instead of allowing that function to be generated by visual studio, it does not recognize it and it ignores it?
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Well...you do have to link it in to the form? 
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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It's been that type of day ... I'm glad someone can get a laugh out of it
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Haha, that tune is stuck in my head now
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I have a problem in my project ( Camera Base Attendance system ) ....
I have two pictures and I need to find the diffrence between them by using ( blob center ) ,
also to divide the image to 6 parts and find the center of each part.( to check the absence ).
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So what have you tried?
did you need advice on what algorithm to use?
have you read this article? Simple image comparison in .NET[^]
Every day, thousands of innocent plants are killed by vegetarians.
Help end the violence EAT BACON
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I read it but I didn't get what I need ...
What I mean is like in those two pictures in link , I make them to be more clear ...
-this the original image:
( http://im60.gulfup.com/KLUt5k.png ).
-so I need a code to divide it to six positions:
( http://im60.gulfup.com/9xZhYL.png ).
- also find the missing person and mark him absent:
( http://im60.gulfup.com/kT9gZv.png ).
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