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Modernize C# snippets (System.Collections.Specialized) #13006

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4e8464a
Modernize C# snippets
gewarren Aug 19, 2026
8b13093
consolidate snippet files
gewarren Aug 19, 2026
2b17f21
fix compile error
gewarren Aug 19, 2026
86ee37b
Update snippets/csharp/System.Collections.Specialized/StringCollectio…
gewarren Aug 21, 2026
8564715
revert change
gewarren Aug 21, 2026
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2 changes: 1 addition & 1 deletion snippets/csharp/System.Collections.Specialized/BitVector32+Section/Overview/Project.csproj
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@@ -1,7 +1,7 @@
<Project Sdk="Microsoft.NET.Sdk">

<PropertyGroup>
<OutputType>Library</OutputType>
<OutputType>Exe</OutputType>
<TargetFramework>net10.0</TargetFramework>
</PropertyGroup>

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70 changes: 36 additions & 34 deletions ...sharp/System.Collections.Specialized/BitVector32+Section/Overview/bitvector32_sections.cs
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Expand Up @@ -4,46 +4,48 @@
using System;
using System.Collections.Specialized;

public class SamplesBitVector32 {
public class SamplesBitVector32
{

public static void Main() {
public static void Main()
{

// Creates and initializes a BitVector32.
BitVector32 myBV = new BitVector32( 0 );
// Creates and initializes a BitVector32.
BitVector32 myBV = new(0);

// Creates four sections in the BitVector32 with maximum values 6, 3, 1, and 15.
// mySect3, which uses exactly one bit, can also be used as a bit flag.
BitVector32.Section mySect1 = BitVector32.CreateSection( 6 );
BitVector32.Section mySect2 = BitVector32.CreateSection( 3, mySect1 );
BitVector32.Section mySect3 = BitVector32.CreateSection( 1, mySect2 );
BitVector32.Section mySect4 = BitVector32.CreateSection( 15, mySect3 );
// Creates four sections in the BitVector32 with maximum values 6, 3, 1, and 15.
// mySect3, which uses exactly one bit, can also be used as a bit flag.
BitVector32.Section mySect1 = BitVector32.CreateSection(6);
BitVector32.Section mySect2 = BitVector32.CreateSection(3, mySect1);
BitVector32.Section mySect3 = BitVector32.CreateSection(1, mySect2);
BitVector32.Section mySect4 = BitVector32.CreateSection(15, mySect3);

// Displays the values of the sections.
Console.WriteLine( "Initial values:" );
Console.WriteLine( "\tmySect1: {0}", myBV[mySect1] );
Console.WriteLine( "\tmySect2: {0}", myBV[mySect2] );
Console.WriteLine( "\tmySect3: {0}", myBV[mySect3] );
Console.WriteLine( "\tmySect4: {0}", myBV[mySect4] );
// Displays the values of the sections.
Console.WriteLine("Initial values:");
Console.WriteLine($"\tmySect1: {myBV[mySect1]}");
Console.WriteLine($"\tmySect2: {myBV[mySect2]}");
Console.WriteLine($"\tmySect3: {myBV[mySect3]}");
Console.WriteLine($"\tmySect4: {myBV[mySect4]}");

// Sets each section to a new value and displays the value of the BitVector32 at each step.
Console.WriteLine( "Changing the values of each section:" );
Console.WriteLine( "\tInitial: \t{0}", myBV.ToString() );
myBV[mySect1] = 5;
Console.WriteLine( "\tmySect1 = 5:\t{0}", myBV.ToString() );
myBV[mySect2] = 3;
Console.WriteLine( "\tmySect2 = 3:\t{0}", myBV.ToString() );
myBV[mySect3] = 1;
Console.WriteLine( "\tmySect3 = 1:\t{0}", myBV.ToString() );
myBV[mySect4] = 9;
Console.WriteLine( "\tmySect4 = 9:\t{0}", myBV.ToString() );
// Sets each section to a new value and displays the value of the BitVector32 at each step.
Console.WriteLine("Changing the values of each section:");
Console.WriteLine($"\tInitial: \t{myBV}");
myBV[mySect1] = 5;
Console.WriteLine($"\tmySect1 = 5:\t{myBV}");
myBV[mySect2] = 3;
Console.WriteLine($"\tmySect2 = 3:\t{myBV}");
myBV[mySect3] = 1;
Console.WriteLine($"\tmySect3 = 1:\t{myBV}");
myBV[mySect4] = 9;
Console.WriteLine($"\tmySect4 = 9:\t{myBV}");

// Displays the values of the sections.
Console.WriteLine( "New values:" );
Console.WriteLine( "\tmySect1: {0}", myBV[mySect1] );
Console.WriteLine( "\tmySect2: {0}", myBV[mySect2] );
Console.WriteLine( "\tmySect3: {0}", myBV[mySect3] );
Console.WriteLine( "\tmySect4: {0}", myBV[mySect4] );
}
// Displays the values of the sections.
Console.WriteLine("New values:");
Console.WriteLine($"\tmySect1: {myBV[mySect1]}");
Console.WriteLine($"\tmySect2: {myBV[mySect2]}");
Console.WriteLine($"\tmySect3: {myBV[mySect3]}");
Console.WriteLine($"\tmySect4: {myBV[mySect4]}");
}
}

/*
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2 changes: 1 addition & 1 deletion snippets/csharp/System.Collections.Specialized/BitVector32/CreateMask/Project.csproj
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@@ -1,7 +1,7 @@
<Project Sdk="Microsoft.NET.Sdk">

<PropertyGroup>
<OutputType>Library</OutputType>
<OutputType>Exe</OutputType>
<TargetFramework>net10.0</TargetFramework>
</PropertyGroup>

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52 changes: 27 additions & 25 deletions ...s/csharp/System.Collections.Specialized/BitVector32/CreateMask/bitvector32_createmasks.cs
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Expand Up @@ -4,31 +4,33 @@
using System;
using System.Collections.Specialized;

public class SamplesBitVector32 {

public static void Main() {

// Creates and initializes a BitVector32 with all bit flags set to FALSE.
BitVector32 myBV = new BitVector32( 0 );

// Creates masks to isolate each of the first five bit flags.
int myBit1 = BitVector32.CreateMask();
int myBit2 = BitVector32.CreateMask( myBit1 );
int myBit3 = BitVector32.CreateMask( myBit2 );
int myBit4 = BitVector32.CreateMask( myBit3 );
int myBit5 = BitVector32.CreateMask( myBit4 );
Console.WriteLine( "Initial: \t{0}", myBV.ToString() );

// Sets the third bit to TRUE.
myBV[myBit3] = true;
Console.WriteLine( "myBit3 = TRUE \t{0}", myBV.ToString() );

// Combines two masks to access multiple bits at a time.
myBV[myBit4 + myBit5] = true;
Console.WriteLine( "myBit4 + myBit5 = TRUE \t{0}", myBV.ToString() );
myBV[myBit1 | myBit2] = true;
Console.WriteLine( "myBit1 | myBit2 = TRUE \t{0}", myBV.ToString() );
}
public class SamplesBitVector32
{

public static void Main()
{

// Creates and initializes a BitVector32 with all bit flags set to FALSE.
BitVector32 myBV = new(0);

// Creates masks to isolate each of the first five bit flags.
int myBit1 = BitVector32.CreateMask();
int myBit2 = BitVector32.CreateMask(myBit1);
int myBit3 = BitVector32.CreateMask(myBit2);
int myBit4 = BitVector32.CreateMask(myBit3);
int myBit5 = BitVector32.CreateMask(myBit4);
Console.WriteLine($"Initial: \t{myBV}");

// Sets the third bit to TRUE.
myBV[myBit3] = true;
Console.WriteLine($"myBit3 = TRUE \t{myBV}");

// Combines two masks to access multiple bits at a time.
myBV[myBit4 + myBit5] = true;
Console.WriteLine($"myBit4 + myBit5 = TRUE \t{myBV}");
myBV[myBit1 | myBit2] = true;
Console.WriteLine($"myBit1 | myBit2 = TRUE \t{myBV}");
}
}

/*
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2 changes: 1 addition & 1 deletion snippets/csharp/System.Collections.Specialized/BitVector32/Equals/Project.csproj
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<Project Sdk="Microsoft.NET.Sdk">

<PropertyGroup>
<OutputType>Library</OutputType>
<OutputType>Exe</OutputType>
<TargetFramework>net10.0</TargetFramework>
</PropertyGroup>

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90 changes: 46 additions & 44 deletions snippets/csharp/System.Collections.Specialized/BitVector32/Equals/bitvector32_equals.cs
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Expand Up @@ -4,57 +4,59 @@
using System;
using System.Collections.Specialized;

public class SamplesBitVector32 {
public class SamplesBitVector32
{

public static void Main() {
public static void Main()
{

// Creates and initializes a BitVector32 with the value 123.
// This is the BitVector32 that will be compared to different types.
BitVector32 myBV = new BitVector32( 123 );
// Creates and initializes a BitVector32 with the value 123.
// This is the BitVector32 that will be compared to different types.
BitVector32 myBV = new(123);

// Creates and initializes a new BitVector32 which will be set up as sections.
BitVector32 myBVsect = new BitVector32( 0 );
// Creates and initializes a new BitVector32 which will be set up as sections.
BitVector32 myBVsect = new(0);

// Compares myBV and myBVsect.
Console.WriteLine( "myBV : {0}", myBV.ToString() );
Console.WriteLine( "myBVsect : {0}", myBVsect.ToString() );
if ( myBV.Equals( myBVsect ) )
Console.WriteLine( " myBV({0}) equals myBVsect({1}).", myBV.Data, myBVsect.Data );
else
Console.WriteLine( " myBV({0}) does not equal myBVsect({1}).", myBV.Data, myBVsect.Data );
Console.WriteLine();
// Compares myBV and myBVsect.
Console.WriteLine($"myBV : {myBV}");
Console.WriteLine($"myBVsect : {myBVsect}");
if (myBV.Equals(myBVsect))
Console.WriteLine($" myBV({myBV.Data}) equals myBVsect({myBVsect.Data}).");
else
Console.WriteLine($" myBV({myBV.Data}) does not equal myBVsect({myBVsect.Data}).");
Console.WriteLine();

// Assigns values to the sections of myBVsect.
BitVector32.Section mySect1 = BitVector32.CreateSection( 5 );
BitVector32.Section mySect2 = BitVector32.CreateSection( 1, mySect1 );
BitVector32.Section mySect3 = BitVector32.CreateSection( 20, mySect2 );
myBVsect[mySect1] = 3;
myBVsect[mySect2] = 1;
myBVsect[mySect3] = 7;
// Assigns values to the sections of myBVsect.
BitVector32.Section mySect1 = BitVector32.CreateSection(5);
BitVector32.Section mySect2 = BitVector32.CreateSection(1, mySect1);
BitVector32.Section mySect3 = BitVector32.CreateSection(20, mySect2);
myBVsect[mySect1] = 3;
myBVsect[mySect2] = 1;
myBVsect[mySect3] = 7;

// Compares myBV and myBVsect.
Console.WriteLine( "myBV : {0}", myBV.ToString() );
Console.WriteLine( "myBVsect with values : {0}", myBVsect.ToString() );
if ( myBV.Equals( myBVsect ) )
Console.WriteLine( " myBV({0}) equals myBVsect({1}).", myBV.Data, myBVsect.Data );
else
Console.WriteLine( " myBV({0}) does not equal myBVsect({1}).", myBV.Data, myBVsect.Data );
Console.WriteLine();
// Compares myBV and myBVsect.
Console.WriteLine($"myBV : {myBV}");
Console.WriteLine($"myBVsect with values : {myBVsect}");
if (myBV.Equals(myBVsect))
Console.WriteLine($" myBV({myBV.Data}) equals myBVsect({myBVsect.Data}).");
else
Console.WriteLine($" myBV({myBV.Data}) does not equal myBVsect({myBVsect.Data}).");
Console.WriteLine();

// Compare myBV with an Int32.
Console.WriteLine( "Comparing myBV with an Int32: " );
Int32 myInt32 = 123;
// Using Equals will fail because Int32 is not compatible with BitVector32.
if ( myBV.Equals( myInt32 ) )
Console.WriteLine( " Using BitVector32.Equals, myBV({0}) equals myInt32({1}).", myBV.Data, myInt32 );
else
Console.WriteLine( " Using BitVector32.Equals, myBV({0}) does not equal myInt32({1}).", myBV.Data, myInt32 );
// To compare a BitVector32 with an Int32, use the "==" operator.
if ( myBV.Data == myInt32 )
Console.WriteLine( " Using the \"==\" operator, myBV.Data({0}) equals myInt32({1}).", myBV.Data, myInt32 );
else
Console.WriteLine( " Using the \"==\" operator, myBV.Data({0}) does not equal myInt32({1}).", myBV.Data, myInt32 );
}
// Compare myBV with an Int32.
Console.WriteLine("Comparing myBV with an Int32: ");
int myInt32 = 123;
// Using Equals will fail because Int32 is not compatible with BitVector32.
if (myBV.Equals(myInt32))
Console.WriteLine($" Using BitVector32.Equals, myBV({myBV.Data}) equals myInt32({myInt32}).");
else
Console.WriteLine($" Using BitVector32.Equals, myBV({myBV.Data}) does not equal myInt32({myInt32}).");
// To compare a BitVector32 with an Int32, use the "==" operator.
if (myBV.Data == myInt32)
Console.WriteLine($" Using the \"==\" operator, myBV.Data({myBV.Data}) equals myInt32({myInt32}).");
else
Console.WriteLine($" Using the \"==\" operator, myBV.Data({myBV.Data}) does not equal myInt32({myInt32}).");
}
}

/*
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2 changes: 1 addition & 1 deletion snippets/csharp/System.Collections.Specialized/BitVector32/Overview/Project.csproj
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@@ -1,7 +1,7 @@
<Project Sdk="Microsoft.NET.Sdk">

<PropertyGroup>
<OutputType>Library</OutputType>
<OutputType>Exe</OutputType>
<TargetFramework>net10.0</TargetFramework>
</PropertyGroup>

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50 changes: 26 additions & 24 deletions snippets/csharp/System.Collections.Specialized/BitVector32/Overview/bitvector32_bitflags.cs
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Expand Up @@ -4,30 +4,32 @@
using System;
using System.Collections.Specialized;

public class SamplesBitVector32 {

public static void Main() {

// Creates and initializes a BitVector32 with all bit flags set to FALSE.
BitVector32 myBV = new BitVector32( 0 );

// Creates masks to isolate each of the first five bit flags.
int myBit1 = BitVector32.CreateMask();
int myBit2 = BitVector32.CreateMask( myBit1 );
int myBit3 = BitVector32.CreateMask( myBit2 );
int myBit4 = BitVector32.CreateMask( myBit3 );
int myBit5 = BitVector32.CreateMask( myBit4 );

// Sets the alternating bits to TRUE.
Console.WriteLine( "Setting alternating bits to TRUE:" );
Console.WriteLine( " Initial: {0}", myBV.ToString() );
myBV[myBit1] = true;
Console.WriteLine( " myBit1 = TRUE: {0}", myBV.ToString() );
myBV[myBit3] = true;
Console.WriteLine( " myBit3 = TRUE: {0}", myBV.ToString() );
myBV[myBit5] = true;
Console.WriteLine( " myBit5 = TRUE: {0}", myBV.ToString() );
}
public class SamplesBitVector32
{

public static void Main()
{

// Creates and initializes a BitVector32 with all bit flags set to FALSE.
BitVector32 myBV = new(0);

// Creates masks to isolate each of the first five bit flags.
int myBit1 = BitVector32.CreateMask();
int myBit2 = BitVector32.CreateMask(myBit1);
int myBit3 = BitVector32.CreateMask(myBit2);
int myBit4 = BitVector32.CreateMask(myBit3);
int myBit5 = BitVector32.CreateMask(myBit4);

// Sets the alternating bits to TRUE.
Console.WriteLine("Setting alternating bits to TRUE:");
Console.WriteLine($" Initial: {myBV}");
myBV[myBit1] = true;
Console.WriteLine($" myBit1 = TRUE: {myBV}");
myBV[myBit3] = true;
Console.WriteLine($" myBit3 = TRUE: {myBV}");
myBV[myBit5] = true;
Console.WriteLine($" myBit5 = TRUE: {myBV}");
}
}

/*
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2 changes: 1 addition & 1 deletion snippets/csharp/System.Collections.Specialized/CollectionsUtil/Overview/Project.csproj
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<Project Sdk="Microsoft.NET.Sdk">

<PropertyGroup>
<OutputType>Library</OutputType>
<OutputType>Exe</OutputType>
<TargetFramework>net10.0</TargetFramework>
</PropertyGroup>

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20 changes: 10 additions & 10 deletions snippets/csharp/System.Collections.Specialized/CollectionsUtil/Overview/source.cs
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Expand Up @@ -16,28 +16,28 @@ public static void Main()

// Select cities from the table using mixed case.
Console.WriteLine("Case insensitive hashtable results:\n");
Console.WriteLine("{0}'s population is: {1}", "Trapperville", population1["trapperville"]);
Console.WriteLine("{0}'s population is: {1}", "Doggerton", population1["DOGGERTON"]);
Console.WriteLine("{0}'s population is: {1}", "New Hollow", population1["New hoLLow"]);
Console.WriteLine("{0}'s population is: {1}", "McHenry", population1["MchenrY"]);
Console.WriteLine($"{"Trapperville"}'s population is: {population1["trapperville"]}");
Console.WriteLine($"{"Doggerton"}'s population is: {population1["DOGGERTON"]}");
Console.WriteLine($"{"New Hollow"}'s population is: {population1["New hoLLow"]}");
Console.WriteLine($"{"McHenry"}'s population is: {population1["MchenrY"]}");

SortedList population2 = CollectionsUtil.CreateCaseInsensitiveSortedList();

foreach (string city in population1.Keys)
{
population2.Add(city, population1[city]);
population2.Add(city, population1[city]);
}

// Select cities from the sorted list using mixed case.
Console.WriteLine("\nCase insensitive sorted list results:\n");
Console.WriteLine("{0}'s population is: {1}", "Trapperville", population2["trapPeRVille"]);
Console.WriteLine("{0}'s population is: {1}", "Doggerton", population2["dOGGeRtON"]);
Console.WriteLine("{0}'s population is: {1}", "New Hollow", population2["nEW hOLLOW"]);
Console.WriteLine("{0}'s population is: {1}", "McHenry", population2["MchEnrY"]);
Console.WriteLine($"{"Trapperville"}'s population is: {population2["trapPeRVille"]}");
Console.WriteLine($"{"Doggerton"}'s population is: {population2["dOGGeRtON"]}");
Console.WriteLine($"{"New Hollow"}'s population is: {population2["nEW hOLLOW"]}");
Console.WriteLine($"{"McHenry"}'s population is: {population2["MchEnrY"]}");
}
}

// This program displays the following output to the console
// This program displays the following output to the console.
//
// Case insensitive hashtable results:
//
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2 changes: 1 addition & 1 deletion snippets/csharp/System.Collections.Specialized/HybridDictionary/Add/Project.csproj
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@@ -1,7 +1,7 @@
<Project Sdk="Microsoft.NET.Sdk">

<PropertyGroup>
<OutputType>Library</OutputType>
<OutputType>Exe</OutputType>
<TargetFramework>net10.0</TargetFramework>
</PropertyGroup>

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