This book will give you a straight-forward introduction to Web-Scale IT in which powerful software acts as a key driver of datacenter efficiency and flexibility 

In .NET 6 (preview 4), two long-awaited types have been introduced as part of the core library. DateOnly and TimeOnly allow developers to represent either the date or time portion of a DateTime. These two new types are structs (value types) and may be used when your code deals with date or time concepts independently. Both types can be found in the System namespace. Using these new types may align well with how databases allow similar data to be represented. Specifically, these types align well with the SQL Server date and time data types. 

This article will show you how to build your Web API with the new ASP.NET Core 3.0 and how to integrate with Auth0 in order to secure them. Following the steps described in this tutorial, you will end up building a simple Web API project

• Convert.ToDateTime()
  
• DateTime.Parse()
• DateTime.ParseExact()
• DateTime.TryParse()
• DateTime.TryParseExact()

CultureInfo culture = new CultureInfo("en-US");    
DateTime tempDate = Convert.ToDateTime("1/1/2010 12:10:15 PM", culture);

string datestr = null;
Console.WriteLine(Convert.ToDateTime(datestr));//0001-01-01T00:00:00
datestr = "wrong string";
Console.WriteLine(Convert.ToDateTime(datestr));
//Unhandled Exception: System.FormatException: 
//The string was not recognized as a valid DateTime. 
//There is an unknown word starting at index 0.
datestr = "Tue Dec 30,2015";
Console.WriteLine(Convert.ToDateTime(datestr));
//Unhandled Exception: System.FormatException: 
//String was not recognized as a valid DateTime.

string datestr = null;
Console.WriteLine(DateTime.Parse(datestr));
//// Exception: Argument null exception
datestr = "wrong string";            
Console.WriteLine(DateTime.Parse(datestr));
//// Exception: The string was not recognized as a valid DateTime. 
//// There is an unknown word starting at index 0.  
datestr = "Tue Dec 30, 2015";
//Unhandled Exception: System.FormatException: 
//String was not recognized as a valid DateTime. 
Console.WriteLine(DateTime.Parse(datestr));  
 

string datestr = null;
CultureInfo provider = CultureInfo.InvariantCulture;
Console.WriteLine(DateTime.ParseExact(datestr, "mm/dd/yyyy", provider));
//Unhandled Exception: System.ArgumentNullException: 
//String reference not set to an instance of a String.
datestr = "wrong date";
Console.WriteLine(DateTime.ParseExact(datestr, "mm/dd/yyyy", provider));
//Unhandled Exception: System.FormatException: 
//String was not recognized as a valid DateTime
datestr = "Tue Dec 30, 2015";
Console.WriteLine(DateTime.ParseExact(datestr, "mm/dd/yyyy", provider));
//Unhandled Exception: System.FormatException: 
//String was not recognized as a valid DateTime.
datestr = "10-22-2015";
Console.WriteLine(DateTime.ParseExact(datestr, "MM-dd-yyyy", provider));
//30/07/1394 12:00:00 ق.ظ
datestr = "10-22-2015";
Console.WriteLine(DateTime.ParseExact(datestr, new string[]
    {"MM-dd-yyyy", "MM/dd/yyyy", "MM.dd.yyyy"}, provider, DateTimeStyles.None));
//30/07/1394 12:00:00 ق.ظ

string datestr = null;
            DateTime temp;
            Console.WriteLine(DateTime.TryParse(datestr, out temp));
            Console.WriteLine(temp);
            //False
            //0001 - 01 - 01T00: 00:00

            datestr = "wrong date";
            Console.WriteLine(DateTime.TryParse(datestr, out temp));
            Console.WriteLine(temp);
            //False
            //0001 - 01 - 01T00: 00:00

            datestr = "Tue Dec 30, 2015";
            Console.WriteLine(DateTime.TryParse(datestr, out temp));
            Console.WriteLine(temp);
            //False
            //0001 - 01 - 01T00: 00:00

  string datestr = null;
            DateTime temp;
            CultureInfo provider = CultureInfo.InvariantCulture;
            Console.WriteLine(DateTime.TryParseExact(datestr, "MM/dd/yyyy", provider, DateTimeStyles.None, out temp));
            Console.WriteLine(temp);
            //False
            //1/1/0001 12:00:00 AM

            datestr = "wrong date";
            Console.WriteLine(DateTime.TryParseExact(datestr, "MM/dd/yyyy", provider, DateTimeStyles.None, out temp));
            Console.WriteLine(temp);
            //False
            //1/1/0001 12:00:00 AM

            datestr = "Tue Dec 30, 2015";
            Console.WriteLine(DateTime.TryParseExact(datestr, "MM/dd/yyyy", provider, DateTimeStyles.None, out temp));
            Console.WriteLine(temp);
            //False
            //1/1/0001 12:00:00 AM

            datestr = "10‐22‐2015";
            Console.WriteLine(DateTime.TryParseExact(datestr, "MM/dd/yyyy", provider, DateTimeStyles.None, out temp));
            Console.WriteLine(temp);
            //False
            //1/1/0001 12:00:00 AM

            datestr = "10‐22‐2015";
            Console.WriteLine(DateTime.TryParseExact(
            datestr, "MM‐dd‐yyyy", provider, DateTimeStyles.None, out temp));
            Console.WriteLine(temp);
            //True
            //30/07/1394 12:00:00 ق.ظ

            datestr = "10‐12‐2015";
            Console.WriteLine(DateTime.TryParseExact(datestr, new string[] { "MM/dd/yyyy", "MM‐dd‐yyyy", "MM.dd.yyyy" }, provider, DateTimeStyles.None, out temp));
            Console.WriteLine(temp);
            //True
            //20/07/1394 12:00:00 ق.ظ

Find If Your PC is Affected by Meltdown and Spectre CPU Vulnerabilities 

PowerShell Verification

Install the PowerShell module
PS > Install-Module SpeculationControl

Run the PowerShell module to validate protections are enabled
PS > Get-SpeculationControlSettings

Just-in-time (JIT in PostgreSQL) compilation of SQL statements is one of the highlighted features in PostgreSQL 11. There is great excitement in the community because of the many claims of up to a 30% jump in performance.  

public class AndBreadCrumbItem {

    private int Id;
    private String diplayText;

    public AndBreadCrumbItem(int Id, String displayText)
    {
        this.Id=Id;
        this.diplayText=displayText;
    }
    public String getDiplayText() {
        return diplayText;
    }
    public void setDiplayText(String diplayText) {
        this.diplayText = diplayText;
    }
    public int getId() {
        return Id;
    }
    public void setId(int id) {
        Id = id;
    }
}

AndBreadCrumbItem itemhome=new AndBreadCrumbItem(0,"Home");
AndBreadCrumbItem itemproducts=new AndBreadCrumbItem(12,"Products");
 AndBreadCrumbItem itemdigital=new AndBreadCrumbItem(15,"Digital");
AndBreadCrumbItem itemhdd=new AndBreadCrumbItem(56,"Hard Disk Drive");

AndBreadCrumb breadCrumb=new AndBreadCrumb(this);

        breadCrumb.AddNewItem(itemhome);
        breadCrumb.AddNewItem(itemproducts);
        breadCrumb.AddNewItem(itemdigital);
        breadCrumb.AddNewItem(itemhdd);

breadCumb.setContext(this);

        LinearLayout layout=(LinearLayout)getActivity().findViewById(R.id.breadcumblayout);
        layout.setPadding(8, 8, 8, 8);
        breadCrumb.setLayout(layout);
        breadCrumb.SetTinyNextNodeImage(R.drawable.arrow);
        breadCrumb.setTextSize(25);
        breadCrumb.SetViewStyleId(R.drawable.list_item_style);

        breadCrumb.UpdatePath();

breadCrumb.setRTL(true);

breadCrumb.setOnTextViewUpdate(new ITextViewUpdate() {
            @Override
            public TextView UpdateTextView(Context context, TextView tv) {
                tv.setTextColor(...);
                tv.setTypeface(...);
                return tv;
            }
        });

breadCumb.setOnClickListener(new IClickListener() {
            @Override
            public void onClick(int position, int Id) {
                  //...
            }
        });

 //=-=--=-=-=-=-=-=-=-=-=-=-=- Private Properties -=-=-=-=-=-=-=--=-=-=
    private List<AndBreadCrumbItem> items=null;
    private List<TextView> textViews;
    private int tinyNextNodeImage;
    private int viewStyleId;
    private Context context;
    private boolean RTL;
    private float textSize=20;
    private boolean noResize=false;

    LinearLayout layout;
    IClickListener clickListener;
    ITextViewUpdate textViewUpdate;
    LinearLayout.LayoutParams params ;

    //=-=---=-=-=-=-- Constructor =--=-=-=-=-=--=-=-

    public AndBreadCrumb(Context context)
    {
        this.context=context;
        params = new LinearLayout.LayoutParams
                (LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
    }

    //=-=-=--=--=-=-=-=-=-=-=-=-  Public Properties --=-=-=-=-=-=--=-=-=-=-=-=-

    //each category would be added to create path
    public void AddNewItem(AndBreadCrumbItem item)
    {
        if(items==null)
            items=new ArrayList<>();
        items.add(item);
    }

    // if you want a pointer or next node between categories or textviews
    public void SetTinyNextNodeImage(int resId) {this.tinyNextNodeImage=resId;}

    public void SetViewStyleId(int resId) {this.viewStyleId=resId;}

    public void setTextSize(float textSize) {this.textSize = textSize;}

    public boolean isRTL() {
        return RTL;
    }

    public void setRTL(boolean RTL) {
        this.RTL = RTL;
    }

    public void setLayout(LinearLayout layout) {

        this.layout = layout;
    }

    public void setContext(Context context) {
        this.context = context;
    }

    public boolean isNoResize() {
        return noResize;
    }

    public void setNoResize(boolean noResize) {
        this.noResize = noResize;
    }

 //primary method for render objects on layout
    private void DrawPath() {


        //stop here if essentail elements aren't present
        if (items == null) return ;
        if (layout == null) return;
        if (items.size() == 0) return;


//we need to get size of layout,so we use the post method to run this thread when ui is ready
        layout.post(new Runnable() {
            @Override
            public void run() {


                //textviews created here one by one
                int position = 0;
                textViews = new ArrayList<>();
                for (AndBreadCrumbItem item : items) {
                    TextView tv = MakeTextView(position, item.getId());
                    tv.setText(item.getDiplayText());
                    textViews.add(tv);
                    position++;
                }


                //add textviews on layout
                AddTextViewsOnLayout();

                //we dont manage resizing anymore
                if(isNoResize()) return;

                //run this code after textviews Added to get widths of them
                TextView last_tv=textViews.get(textViews.size()-1);
                last_tv.post(new Runnable() {
                    @Override
                    public void run() {
                        //define width of each textview depend on screen width
                        BatchSizeOperation();
                    }
                });

            }
        });


    }

  private TextView MakeTextView(final int position, final int Id)
    {
        //settings for cumbs
        TextView tv=new TextView(this.context);
        tv.setEllipsize(TextUtils.TruncateAt.END);
        tv.setSingleLine(true);
        tv.setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize);
        tv.setBackgroundResource(viewStyleId);

        /*call custom event - this event will be fired when user click on one of
         textviews and returns position of textview and value that user sat as id
         */
        tv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                SetPosition(position);
                clickListener.onClick(position, Id);
            }
        });

        //if user wants to update each textviews
        if(textViewUpdate!=null)
            tv=textViewUpdate.UpdateTextView(context,tv);

        if(isRTL())
            tv.setRotationY(180);

        return tv;
    }

 //this method calling by everywhere to needs add textviews on the layout like master method :drawpath
    private void AddTextViewsOnLayout()
    {
        //prepare layout
        //remove everything on layout for recreate it
        layout.removeAllViews();
        layout.setOrientation(LinearLayout.HORIZONTAL);
        layout.setVerticalGravity(Gravity.CENTER_VERTICAL);
        if(isRTL())
            layout.setRotationY(180);



        //add textviews one by one

        int position=0;
        for (TextView tv:textViews)
        {
            layout.addView(tv,params);

            //add next node image between textviews if user defined a next node image
            if(tinyNextNodeImage>0)
                if(position<(textViews.size()-1)) {
                    layout.addView(GetNodeImage(), params);
                    position++;
                }
        }

    }