using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Runtime.InteropServices;
using Cpp2IlInjected;

namespace System.Collections.ObjectModel
{
	/// <summary>Provides the abstract base class for a collection whose keys are embedded in the values.</summary>
	/// <typeparam name="TKey">The type of keys in the collection.</typeparam>
	/// <typeparam name="TItem">The type of items in the collection.</typeparam>
	// Token: 0x020005D3 RID: 1491
	[Token(Token = "0x20005D3")]
	[ComVisible(false)]
	[DebuggerTypeProxy(typeof(Mscorlib_KeyedCollectionDebugView<, >))]
	[DebuggerDisplay("Count = {Count}")]
	[Serializable]
	public abstract class KeyedCollection<TKey, TItem> : Collection<TItem>
	{
		/// <summary>Initializes a new instance of the <see cref="T:System.Collections.ObjectModel.KeyedCollection`2" /> class that uses the default equality comparer.</summary>
		// Token: 0x06002D64 RID: 11620 RVA: 0x00002050 File Offset: 0x00000250
		[Token(Token = "0x6002D64")]
		[Address(RVA = "0x2B02B70", Offset = "0x2B01970", VA = "0x182B02B70")]
		protected KeyedCollection()
		{
		}

		/// <summary>Initializes a new instance of the <see cref="T:System.Collections.ObjectModel.KeyedCollection`2" /> class that uses the specified equality comparer.</summary>
		/// <param name="comparer">The implementation of the <see cref="T:System.Collections.Generic.IEqualityComparer`1" /> generic interface to use when comparing keys, or <see langword="null" /> to use the default equality comparer for the type of the key, obtained from <see cref="P:System.Collections.Generic.EqualityComparer`1.Default" />.</param>
		// Token: 0x06002D65 RID: 11621 RVA: 0x00002050 File Offset: 0x00000250
		[Token(Token = "0x6002D65")]
		[Address(RVA = "0x28EB600", Offset = "0x28EA400", VA = "0x1828EB600")]
		protected KeyedCollection(IEqualityComparer<TKey> comparer)
		{
		}

		/// <summary>Initializes a new instance of the <see cref="T:System.Collections.ObjectModel.KeyedCollection`2" /> class that uses the specified equality comparer and creates a lookup dictionary when the specified threshold is exceeded.</summary>
		/// <param name="comparer">The implementation of the <see cref="T:System.Collections.Generic.IEqualityComparer`1" /> generic interface to use when comparing keys, or <see langword="null" /> to use the default equality comparer for the type of the key, obtained from <see cref="P:System.Collections.Generic.EqualityComparer`1.Default" />.</param>
		/// <param name="dictionaryCreationThreshold">The number of elements the collection can hold without creating a lookup dictionary (0 creates the lookup dictionary when the first item is added), or -1 to specify that a lookup dictionary is never created.</param>
		/// <exception cref="T:System.ArgumentOutOfRangeException">
		///   <paramref name="dictionaryCreationThreshold" /> is less than -1.</exception>
		// Token: 0x06002D66 RID: 11622 RVA: 0x00002050 File Offset: 0x00000250
		[Token(Token = "0x6002D66")]
		[Address(RVA = "0x32039C0", Offset = "0x32027C0", VA = "0x1832039C0")]
		protected KeyedCollection(IEqualityComparer<TKey> comparer, int dictionaryCreationThreshold)
		{
		}

		/// <summary>Gets the element with the specified key.</summary>
		/// <param name="key">The key of the element to get.</param>
		/// <returns>The element with the specified key. If an element with the specified key is not found, an exception is thrown.</returns>
		/// <exception cref="T:System.ArgumentNullException">
		///   <paramref name="key" /> is <see langword="null" />.</exception>
		/// <exception cref="T:System.Collections.Generic.KeyNotFoundException">An element with the specified key does not exist in the collection.</exception>
		// Token: 0x170006FC RID: 1788
		[Token(Token = "0x170006FC")]
		public TItem this[TKey key]
		{
			[Token(Token = "0x6002D67")]
			[Address(RVA = "0x3203A60", Offset = "0x3202860", VA = "0x183203A60")]
			get
			{
				return null;
			}
		}

		/// <summary>Determines whether the collection contains an element with the specified key.</summary>
		/// <param name="key">The key to locate in the <see cref="T:System.Collections.ObjectModel.KeyedCollection`2" />.</param>
		/// <returns>
		///   <see langword="true" /> if the <see cref="T:System.Collections.ObjectModel.KeyedCollection`2" /> contains an element with the specified key; otherwise, <see langword="false" />.</returns>
		/// <exception cref="T:System.ArgumentNullException">
		///   <paramref name="key" /> is <see langword="null" />.</exception>
		// Token: 0x06002D68 RID: 11624 RVA: 0x00017BE0 File Offset: 0x00015DE0
		[Token(Token = "0x6002D68")]
		[Address(RVA = "0x3203170", Offset = "0x3201F70", VA = "0x183203170")]
		public bool Contains(TKey key)
		{
			return default(bool);
		}

		/// <summary>Gets the lookup dictionary of the <see cref="T:System.Collections.ObjectModel.KeyedCollection`2" />.</summary>
		/// <returns>The lookup dictionary of the <see cref="T:System.Collections.ObjectModel.KeyedCollection`2" />, if it exists; otherwise, <see langword="null" />.</returns>
		// Token: 0x170006FD RID: 1789
		// (get) Token: 0x06002D69 RID: 11625 RVA: 0x00002082 File Offset: 0x00000282
		[Token(Token = "0x170006FD")]
		protected IDictionary<TKey, TItem> Dictionary
		{
			[Token(Token = "0x6002D69")]
			[Address(RVA = "0x3F63E0", Offset = "0x3F51E0", VA = "0x1803F63E0")]
			get
			{
				return null;
			}
		}

		/// <summary>Removes all elements from the <see cref="T:System.Collections.ObjectModel.KeyedCollection`2" />.</summary>
		// Token: 0x06002D6A RID: 11626 RVA: 0x00002050 File Offset: 0x00000250
		[Token(Token = "0x6002D6A")]
		[Address(RVA = "0x3203110", Offset = "0x3201F10", VA = "0x183203110", Slot = "35")]
		protected override void ClearItems()
		{
		}

		/// <summary>When implemented in a derived class, extracts the key from the specified element.</summary>
		/// <param name="item">The element from which to extract the key.</param>
		/// <returns>The key for the specified element.</returns>
		// Token: 0x06002D6B RID: 11627
		[Token(Token = "0x6002D6B")]
		[Address(Slot = "39")]
		protected abstract TKey GetKeyForItem(TItem item);

		/// <summary>Inserts an element into the <see cref="T:System.Collections.ObjectModel.KeyedCollection`2" /> at the specified index.</summary>
		/// <param name="index">The zero-based index at which <paramref name="item" /> should be inserted.</param>
		/// <param name="item">The object to insert.</param>
		/// <exception cref="T:System.ArgumentOutOfRangeException">
		///   <paramref name="index" /> is less than 0.  
		/// -or-  
		/// <paramref name="index" /> is greater than <see cref="P:System.Collections.ObjectModel.Collection`1.Count" />.</exception>
		// Token: 0x06002D6C RID: 11628 RVA: 0x00002050 File Offset: 0x00000250
		[Token(Token = "0x6002D6C")]
		[Address(RVA = "0x3203630", Offset = "0x3202430", VA = "0x183203630", Slot = "36")]
		protected override void InsertItem(int index, TItem item)
		{
		}

		/// <summary>Removes the element at the specified index of the <see cref="T:System.Collections.ObjectModel.KeyedCollection`2" />.</summary>
		/// <param name="index">The index of the element to remove.</param>
		// Token: 0x06002D6D RID: 11629 RVA: 0x00002050 File Offset: 0x00000250
		[Token(Token = "0x6002D6D")]
		[Address(RVA = "0x32036D0", Offset = "0x32024D0", VA = "0x1832036D0", Slot = "37")]
		protected override void RemoveItem(int index)
		{
		}

		/// <summary>Replaces the item at the specified index with the specified item.</summary>
		/// <param name="index">The zero-based index of the item to be replaced.</param>
		/// <param name="item">The new item.</param>
		// Token: 0x06002D6E RID: 11630 RVA: 0x00002050 File Offset: 0x00000250
		[Token(Token = "0x6002D6E")]
		[Address(RVA = "0x3203800", Offset = "0x3202600", VA = "0x183203800", Slot = "38")]
		protected override void SetItem(int index, TItem item)
		{
		}

		// Token: 0x06002D6F RID: 11631 RVA: 0x00002050 File Offset: 0x00000250
		[Token(Token = "0x6002D6F")]
		[Address(RVA = "0x3203050", Offset = "0x3201E50", VA = "0x183203050")]
		private void AddKey(TKey key, TItem item)
		{
		}

		// Token: 0x06002D70 RID: 11632 RVA: 0x00002050 File Offset: 0x00000250
		[Token(Token = "0x6002D70")]
		[Address(RVA = "0x32033E0", Offset = "0x32021E0", VA = "0x1832033E0")]
		private void CreateDictionary()
		{
		}

		// Token: 0x06002D71 RID: 11633 RVA: 0x00002050 File Offset: 0x00000250
		[Token(Token = "0x6002D71")]
		[Address(RVA = "0x32037D0", Offset = "0x32025D0", VA = "0x1832037D0")]
		private void RemoveKey(TKey key)
		{
		}

		// Token: 0x040019E1 RID: 6625
		[global::Cpp2IlInjected.FieldOffset(Offset = "0x0")]
		[Token(Token = "0x40019E1")]
		private IEqualityComparer<TKey> comparer;

		// Token: 0x040019E2 RID: 6626
		[global::Cpp2IlInjected.FieldOffset(Offset = "0x0")]
		[Token(Token = "0x40019E2")]
		private Dictionary<TKey, TItem> dict;

		// Token: 0x040019E3 RID: 6627
		[global::Cpp2IlInjected.FieldOffset(Offset = "0x0")]
		[Token(Token = "0x40019E3")]
		private int keyCount;

		// Token: 0x040019E4 RID: 6628
		[global::Cpp2IlInjected.FieldOffset(Offset = "0x0")]
		[Token(Token = "0x40019E4")]
		private int threshold;
	}
}