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gewarrengewarren
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Reinstate supplemental remarks (System.Text, System.Threading) (#12706)
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Lines changed: 3594 additions & 25 deletions

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snippets/csharp/System.Text.RegularExpressions/Regex/Match/Project.csproj renamed to snippets/csharp/System.Text/Encoding/Overview/Project.csproj

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@@ -2,7 +2,7 @@
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<PropertyGroup>
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<OutputType>Library</OutputType>
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<TargetFramework>net6.0</TargetFramework>
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<TargetFramework>net10.0</TargetFramework>
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</PropertyGroup>
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</Project>
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</Project>

‎snippets/csharp/System.Text/Encoding/Overview/convert.cs‎

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using System;
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using System.Text;
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class Example
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class ConvertExample
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{
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static void Main()
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static void Run()
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{
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string unicodeString = "This string contains the unicode character Pi (\u03a0)";
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@@ -28,6 +28,7 @@ static void Main()
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Console.WriteLine("Ascii converted string: {0}", asciiString);
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}
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}
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// The example displays the following output:
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// Original string: This string contains the unicode character Pi (Π)
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// Ascii converted string: This string contains the unicode character Pi (?)

‎snippets/csharp/System.Text/Encoding/Overview/getencoding1.cs‎

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// <Snippet1>
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using System;
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using System.Text;
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public class GetEncodingExample
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{
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public static void Run()
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{
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Encoding enc = Encoding.GetEncoding(1253);
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Encoding altEnc = Encoding.GetEncoding("windows-1253");
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Console.WriteLine($"{enc.EncodingName} = Code Page {altEnc.CodePage}: {enc.Equals(altEnc)}");
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string greekAlphabet = "Α α Β β Γ γ Δ δ Ε ε Ζ ζ Η η " +
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"Θ θ Ι ι Κ κ Λ λ Μ μ Ν ν Ξ ξ " +
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"Ο ο Π π Ρ ρ Σ σ ς Τ τ Υ υ " +
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"Φ φ Χ χ Ψ ψ Ω ω";
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Console.OutputEncoding = Encoding.UTF8;
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byte[] bytes = enc.GetBytes(greekAlphabet);
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Console.WriteLine("{0,-12} {1,20} {2,20:X2}", "Character",
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"Unicode Code Point", "Code Page 1253");
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for (int ctr = 0; ctr < bytes.Length; ctr++) {
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if (greekAlphabet[ctr].Equals(' '))
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continue;
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Console.WriteLine("{0,-12} {1,20} {2,20:X2}", greekAlphabet[ctr],
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GetCodePoint(greekAlphabet[ctr]), bytes[ctr]);
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}
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}
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private static string GetCodePoint(char ch)
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{
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string retVal = "u+";
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byte[] bytes = Encoding.Unicode.GetBytes(ch.ToString());
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for (int ctr = bytes.Length - 1; ctr >= 0; ctr--)
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retVal += bytes[ctr].ToString("X2");
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return retVal;
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}
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}
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// The example displays the following output:
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// Character Unicode Code Point Code Page 1253
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// Α u+0391 C1
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// α u+03B1 E1
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// Β u+0392 C2
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// β u+03B2 E2
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// Γ u+0393 C3
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// γ u+03B3 E3
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// Δ u+0394 C4
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// δ u+03B4 E4
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// Ε u+0395 C5
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// ε u+03B5 E5
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// Ζ u+0396 C6
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// ζ u+03B6 E6
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// Η u+0397 C7
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// η u+03B7 E7
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// Θ u+0398 C8
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// θ u+03B8 E8
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// Ι u+0399 C9
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// ι u+03B9 E9
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// Κ u+039A CA
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// κ u+03BA EA
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// Λ u+039B CB
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// λ u+03BB EB
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// Μ u+039C CC
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// μ u+03BC EC
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// Ν u+039D CD
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// ν u+03BD ED
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// Ξ u+039E CE
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// ξ u+03BE EE
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// Ο u+039F CF
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// ο u+03BF EF
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// Π u+03A0 D0
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// π u+03C0 F0
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// Ρ u+03A1 D1
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// ρ u+03C1 F1
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// Σ u+03A3 D3
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// σ u+03C3 F3
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// ς u+03C2 F2
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// Τ u+03A4 D4
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// τ u+03C4 F4
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// Υ u+03A5 D5
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// υ u+03C5 F5
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// Φ u+03A6 D6
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// φ u+03C6 F6
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// Χ u+03A7 D7
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// χ u+03C7 F7
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// Ψ u+03A8 D8
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// ψ u+03C8 F8
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// Ω u+03A9 D9
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// ω u+03C9 F9
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// </Snippet1>

‎snippets/csharp/System.Text/StringBuilder/Overview/Project.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Library</OutputType>
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<TargetFramework>net10.0</TargetFramework>
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<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
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</PropertyGroup>
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</Project>

‎snippets/csharp/System.Text/StringBuilder/Overview/call1.cs‎

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// <Snippet4>
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using System;
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using System.Text;
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public class Example
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{
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public static void Main()
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{
9+
StringBuilder sb = new StringBuilder();
10+
sb.Append("This is the beginning of a sentence, ");
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sb.Replace("the beginning of ", "");
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sb.Insert(sb.ToString().IndexOf("a ") + 2, "complete ");
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sb.Replace(",", ".");
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Console.WriteLine(sb.ToString());
15+
}
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}
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// The example displays the following output:
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// This is a complete sentence.
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// </Snippet4>

‎snippets/csharp/System.Text/StringBuilder/Overview/call2.cs‎

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// <Snippet5>
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using System;
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using System.Text;
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public class Example2
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{
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public static void Main()
8+
{
9+
StringBuilder sb = new StringBuilder("This is the beginning of a sentence, ");
10+
sb.Replace("the beginning of ", "").Insert(sb.ToString().IndexOf("a ") + 2,
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"complete ").Replace(",", ".");
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Console.WriteLine(sb.ToString());
13+
}
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}
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// The example displays the following output:
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// This is a complete sentence.
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// </Snippet5>

‎snippets/csharp/System.Text/StringBuilder/Overview/chars1.cs‎

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// <Snippet7>
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using System;
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using System.Globalization;
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using System.Text;
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6+
public class Example3
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{
8+
public static void Main()
9+
{
10+
Random rnd = new Random();
11+
StringBuilder sb = new StringBuilder();
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13+
// Generate 10 random numbers and store them in a StringBuilder.
14+
for (int ctr = 0; ctr <= 9; ctr++)
15+
sb.Append(rnd.Next().ToString("N5"));
16+
17+
Console.WriteLine("The original string:");
18+
Console.WriteLine(sb.ToString());
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20+
// Decrease each number by one.
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for (int ctr = 0; ctr < sb.Length; ctr++)
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{
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if (Char.GetUnicodeCategory(sb[ctr]) == UnicodeCategory.DecimalDigitNumber)
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{
25+
int number = (int)Char.GetNumericValue(sb[ctr]);
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number--;
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if (number < 0) number = 9;
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sb[ctr] = number.ToString()[0];
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}
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}
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Console.WriteLine("\nThe new string:");
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Console.WriteLine(sb.ToString());
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}
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}
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// The example displays the following output:
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// The original string:
38+
// 1,457,531,530.00000940,522,609.000001,668,113,564.000001,998,992,883.000001,792,660,834.00
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// 000101,203,251.000002,051,183,075.000002,066,000,067.000001,643,701,043.000001,702,382,508
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// .00000
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//
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// The new string:
43+
// 0,346,420,429.99999839,411,598.999990,557,002,453.999990,887,881,772.999990,681,559,723.99
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// 999090,192,140.999991,940,072,964.999991,955,999,956.999990,532,690,932.999990,691,271,497
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// .99999
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// </Snippet7>

‎snippets/csharp/System.Text/StringBuilder/Overview/default1.cs‎

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// <Snippet3>
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using System;
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using System.Reflection;
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using System.Text;
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6+
public class Example4
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{
8+
public static void Main()
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{
10+
StringBuilder sb = new StringBuilder();
11+
ShowSBInfo(sb);
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sb.Append("This is a sentence.");
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ShowSBInfo(sb);
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for (int ctr = 0; ctr <= 10; ctr++)
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{
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sb.Append("This is an additional sentence.");
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ShowSBInfo(sb);
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}
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}
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private static void ShowSBInfo(StringBuilder sb)
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{
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foreach (var prop in sb.GetType().GetProperties())
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{
25+
if (prop.GetIndexParameters().Length == 0)
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Console.Write("{0}: {1:N0} ", prop.Name, prop.GetValue(sb));
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}
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Console.WriteLine();
29+
}
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}
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// The example displays the following output:
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// Capacity: 16 MaxCapacity: 2,147,483,647 Length: 0
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// Capacity: 32 MaxCapacity: 2,147,483,647 Length: 19
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// Capacity: 64 MaxCapacity: 2,147,483,647 Length: 50
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// Capacity: 128 MaxCapacity: 2,147,483,647 Length: 81
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// Capacity: 128 MaxCapacity: 2,147,483,647 Length: 112
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// Capacity: 256 MaxCapacity: 2,147,483,647 Length: 143
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// Capacity: 256 MaxCapacity: 2,147,483,647 Length: 174
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// Capacity: 256 MaxCapacity: 2,147,483,647 Length: 205
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// Capacity: 256 MaxCapacity: 2,147,483,647 Length: 236
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// Capacity: 512 MaxCapacity: 2,147,483,647 Length: 267
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// Capacity: 512 MaxCapacity: 2,147,483,647 Length: 298
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// Capacity: 512 MaxCapacity: 2,147,483,647 Length: 329
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// Capacity: 512 MaxCapacity: 2,147,483,647 Length: 360
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// </Snippet3>

‎snippets/csharp/System.Text/StringBuilder/Overview/delete1.cs‎

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// <Snippet10>
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using System;
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using System.Text;
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public class Example5
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{
7+
public static void Main()
8+
{
9+
StringBuilder sb = new StringBuilder("A StringBuilder object");
10+
ShowSBInfo(sb);
11+
// Remove "object" from the text.
12+
string textToRemove = "object";
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int pos = sb.ToString().IndexOf(textToRemove);
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if (pos >= 0)
15+
{
16+
sb.Remove(pos, textToRemove.Length);
17+
ShowSBInfo(sb);
18+
}
19+
// Clear the StringBuilder contents.
20+
sb.Clear();
21+
ShowSBInfo(sb);
22+
}
23+
24+
public static void ShowSBInfo(StringBuilder sb)
25+
{
26+
Console.WriteLine($"\nValue: {sb.ToString()}");
27+
foreach (var prop in sb.GetType().GetProperties())
28+
{
29+
if (prop.GetIndexParameters().Length == 0)
30+
Console.Write("{0}: {1:N0} ", prop.Name, prop.GetValue(sb));
31+
}
32+
Console.WriteLine();
33+
}
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}
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// The example displays the following output:
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// Value: A StringBuilder object
37+
// Capacity: 22 MaxCapacity: 2,147,483,647 Length: 22
38+
//
39+
// Value: A StringBuilder
40+
// Capacity: 22 MaxCapacity: 2,147,483,647 Length: 16
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//
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// Value:
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// Capacity: 22 MaxCapacity: 2,147,483,647 Length: 0
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// </Snippet10>

‎snippets/csharp/System.Text/StringBuilder/Overview/expand1.cs‎

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// <Snippet9>
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using System;
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using System.Text;
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public class Example6
6+
{
7+
public static void Main()
8+
{
9+
// Create a StringBuilder object with no text.
10+
StringBuilder sb = new StringBuilder();
11+
// Append some text.
12+
sb.Append('*', 10).Append(" Adding Text to a StringBuilder Object ").Append('*', 10);
13+
sb.AppendLine("\n");
14+
sb.AppendLine("Some code points and their corresponding characters:");
15+
// Append some formatted text.
16+
for (int ctr = 50; ctr <= 60; ctr++)
17+
{
18+
sb.AppendFormat("{0,12:X4} {1,12}", ctr, Convert.ToChar(ctr));
19+
sb.AppendLine();
20+
}
21+
// Find the end of the introduction to the column.
22+
int pos = sb.ToString().IndexOf("characters:") + 11 +
23+
Environment.NewLine.Length;
24+
// Insert a column header.
25+
sb.Insert(pos, $"{Environment.NewLine}{"Code Unit",12} {"Character",12}{Environment.NewLine}");
26+
27+
// Convert the StringBuilder to a string and display it.
28+
Console.WriteLine(sb.ToString());
29+
}
30+
}
31+
// The example displays the following output:
32+
// ********** Adding Text to a StringBuilder Object **********
33+
//
34+
// Some code points and their corresponding characters:
35+
//
36+
// Code Unit Character
37+
// 0032 2
38+
// 0033 3
39+
// 0034 4
40+
// 0035 5
41+
// 0036 6
42+
// 0037 7
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// 0038 8
44+
// 0039 9
45+
// 003A :
46+
// 003B ;
47+
// 003C <
48+
// </Snippet9>

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