A thorough understanding of the use of StringBuilder _c# tutorials

Today used to StringBuilder to stitching query statements, found this really useful, decided to make a summary.

Baidu is a StringBuilder definition: the String object is immutable. Each time you use one of the methods in the System.String class, you create a new string object in memory, which requires a new space to be allocated for the new object. The system overhead associated with creating a new string object can be expensive when you need to perform repeated modifications to the string. If you want to modify a string without creating a new object, you can use the System.Text.StringBuilder class.

It is mainly the StringBuilder append () method and the Capacity property.

Note that when the capacity is less than length, the capacity is expanded in twice-fold way.

Using System;
Using System.Collections.Generic;
Using System.Linq;
Using System.Text;
Using System.Threading.Tasks;

Use of namespace StringBuilder
{
  class program
  {
    static void Main (string[] args)
    {
      StringBuilder s = new StringBuilder ();
      Long Datastart = DateTime.Now.Ticks;
      for (int i = 0; i < 1000 i++)
      {
        s.append (' A ', i);
      }
      Long dataend = DateTime.Now.Ticks;
      Console.WriteLine (s.capacity);
      Console.WriteLine ("Spents: {0}", (Dataend-datastart)/100000.0);
      Datastart = DateTime.Now.Ticks;
      for (int i = 0; i < 1000 i++)
      {
        s.append (' A ', i);
        if (S.capacity < s.length)
        {
          s.capacity = 8;
        }
      }
      Dataend = DateTime.Now.Ticks;
      Console.WriteLine ("Spents: {0}", (Dataend-datastart)/100000.0);
      Console.read ();}}

Output results:

The above in-depth understanding of the use of StringBuilder is a small series to share all the content, hope to give you a reference, but also hope that we support the cloud-dwelling community.