Immutable collections
suggest changeThe System.Collections.Immutable NuGet package provides immutable collection classes.
Creating and adding items
var stack = ImmutableStack.Create<int>();
var stack2 = stack.Push(1); // stack is still empty, stack2 contains 1
var stack3 = stack.Push(2); // stack2 still contains only one, stack3 has 2, 1Creating using the builder
Certain immutable collections have a Builder inner class that can be used to cheaply build large immutable instances:
var builder = ImmutableList.CreateBuilder<int>(); // returns ImmutableList.Builder
builder.Add(1);
builder.Add(2);
var list = builder.ToImmutable();Creating from an existing IEnumerable
var numbers = Enumerable.Range(1, 5);
var list = ImmutableList.CreateRange<int>(numbers);List of all immutable collection types:
System.Collections.Immutable.ImmutableArray<T>System.Collections.Immutable.ImmutableDictionary<TKey,TValue>System.Collections.Immutable.ImmutableHashSet<T>System.Collections.Immutable.ImmutableList<T>System.Collections.Immutable.ImmutableQueue<T>System.Collections.Immutable.ImmutableSortedDictionary<TKey,TValue>System.Collections.Immutable.ImmutableSortedSet<T>System.Collections.Immutable.ImmutableStack<T>
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