Add 49 polyfills across System, System.Collections.Generic, System.IO, and System.Linq#91

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Tyrrrz merged 27 commits intoprimefrom

copilot/identify-missing-polyfills

Mar 23, 2026

Commits on Mar 22, 2026

Add `ArgumentOutOfRangeException` throw helper polyfills (.NET 8.0)

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Add `ObjectDisposedException.ThrowIf` polyfills (.NET 8.0)

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Add `Random` Span overloads polyfills (.NET 8.0)

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Add `Convert` Span overloads polyfills (.NET 5.0 / .NET 9.0)

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Add `Stack<T>.TryPeek` / `TryPop` polyfills (.NET Core 2.0)

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Add `EnsureCapacity` polyfills for `Dictionary`, `HashSet`, `Queue`, `Stack`

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Add `Enumerable.Zip` 3-sequence overload polyfill (.NET 6.0)

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Add `TimeSpan` factory overloads polyfills (.NET 7.0 / .NET 9.0)

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Add `Path.Exists` polyfill (.NET 7.0)

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Add `File.AppendAllBytes` Span/Memory overloads (.NET 9.0)

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Add `string.IndexOf(char, StringComparison)` polyfill (.NET 5.0)

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Add `TryParse(ReadOnlySpan<char>, IFormatProvider?, out T)` overloads (.NET 7.0)

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Address code review: fix TimeSpan.FromMicroseconds calculation and improve EnsureCapacity docs

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Address code review: remove throws from EnsureCapacity, split TryParse tests per type, delegate span overloads

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Apply Math.Max(capacity, Count) to all EnsureCapacity polyfills

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Use EqualityComparer<T>.Default for ThrowIfEqual/ThrowIfNotEqual null-safety

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Fix TimeSpan tests to pass explicit 0 for optional params; remove null-conditional in ObjectDisposedException.ThrowIf

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Add struct constraint to ThrowIfNegative, ThrowIfNegativeOrZero, ThrowIfZero

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Address review comments: fix tests, refactor polyfills, add FEATURE_MEMORY guards

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Reorder tests to match impl order; add curly braces to multi-line if statements

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Remove FEATURE_MEMORY guards where not required by the build

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Add FEATURE_MEMORY guards to span test methods that would fail on net462

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Replace ReadOnlySpan<char>.ToString() with new string(s.ToArray()) in all polyfills

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Remove FEATURE_MEMORY guards from all test files

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Add System.Memory package reference to test project to fix net462 build

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Add 49 polyfills across System, System.Collections.Generic, System.IO, and System.Linq#91

Add 49 polyfills across System, System.Collections.Generic, System.IO, and System.Linq#91
Tyrrrz merged 27 commits intoprimefrom
copilot/identify-missing-polyfills

Commits on Mar 22, 2026

Add `ArgumentOutOfRangeException` throw helper polyfills (.NET 8.0)

Add `ObjectDisposedException.ThrowIf` polyfills (.NET 8.0)

Add `Random` Span overloads polyfills (.NET 8.0)

Add `Convert` Span overloads polyfills (.NET 5.0 / .NET 9.0)

Add `Stack<T>.TryPeek` / `TryPop` polyfills (.NET Core 2.0)

Add `EnsureCapacity` polyfills for `Dictionary`, `HashSet`, `Queue`, `Stack`

Add `Enumerable.Zip` 3-sequence overload polyfill (.NET 6.0)

Add `TimeSpan` factory overloads polyfills (.NET 7.0 / .NET 9.0)

Add `Path.Exists` polyfill (.NET 7.0)

Add `File.AppendAllBytes` Span/Memory overloads (.NET 9.0)

Add `string.IndexOf(char, StringComparison)` polyfill (.NET 5.0)

Add `TryParse(ReadOnlySpan<char>, IFormatProvider?, out T)` overloads (.NET 7.0)

Address code review: fix TimeSpan.FromMicroseconds calculation and improve EnsureCapacity docs

Address code review: remove throws from EnsureCapacity, split TryParse tests per type, delegate span overloads

Apply Math.Max(capacity, Count) to all EnsureCapacity polyfills

Use EqualityComparer<T>.Default for ThrowIfEqual/ThrowIfNotEqual null-safety

Fix TimeSpan tests to pass explicit 0 for optional params; remove null-conditional in ObjectDisposedException.ThrowIf

Add struct constraint to ThrowIfNegative, ThrowIfNegativeOrZero, ThrowIfZero

Address review comments: fix tests, refactor polyfills, add FEATURE_MEMORY guards

Reorder tests to match impl order; add curly braces to multi-line if statements

Remove FEATURE_MEMORY guards where not required by the build

Add FEATURE_MEMORY guards to span test methods that would fail on net462

Replace ReadOnlySpan<char>.ToString() with new string(s.ToArray()) in all polyfills

Remove FEATURE_MEMORY guards from all test files

Add System.Memory package reference to test project to fix net462 build

Commits on Mar 23, 2026

Fix build: remove System.Memory from tests (Roslyn crash), add #if !NETFRAMEWORK guards for span tests

Fix TimeSpan.FromMicroseconds test: use FromTicks instead of FromMilliseconds(0.5) which rounds on net462