Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web.ApplicationServices/Security/MembershipUserCollection.cs

@@ -0,0 +1,107 @@
+//------------------------------------------------------------------------------
+// <copyright file="MembershipUserCollection.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.Security {
+
+    using System;
+    using System.Collections;
+    using System.Configuration.Provider;
+    using System.Runtime.CompilerServices;    
+
+    [TypeForwardedFrom("System.Web, Version=2.0.0.0, Culture=Neutral, PublicKeyToken=b03f5f7f11d50a3a")]
+    [Serializable]
+    public sealed class MembershipUserCollection : IEnumerable, ICollection {
+        private Hashtable _Indices = null;
+        private ArrayList _Values = null;
+        private bool _ReadOnly = false;
+
+        public MembershipUserCollection() {
+            _Indices = new Hashtable(10, StringComparer.CurrentCultureIgnoreCase);
+            _Values = new ArrayList();
+        }
+
+        public void Add(MembershipUser user) {
+            if (user == null) {
+                throw new ArgumentNullException("user");
+            }
+
+            if (_ReadOnly)
+                throw new NotSupportedException();
+
+            int pos = _Values.Add(user);
+            try {
+                _Indices.Add(user.UserName, pos);
+            }
+            catch {
+                _Values.RemoveAt(pos);
+                throw;
+            }
+        }
+
+        public void Remove(string name) {
+            if (_ReadOnly)
+                throw new NotSupportedException();
+
+            object pos = _Indices[name];
+            if (pos == null || !(pos is int))
+                return;
+            int ipos = (int)pos;
+            if (ipos >= _Values.Count)
+                return;
+            _Values.RemoveAt(ipos);
+            _Indices.Remove(name);
+            ArrayList al = new ArrayList();
+            foreach (DictionaryEntry de in _Indices)
+                if ((int)de.Value > ipos)
+                    al.Add(de.Key);
+            foreach (string key in al)
+                _Indices[key] = ((int)_Indices[key]) - 1;
+        }
+
+        public MembershipUser this[string name] {
+            get {
+                object pos = _Indices[name];
+                if (pos == null || !(pos is int))
+                    return null;
+                int ipos = (int)pos;
+                if (ipos >= _Values.Count)
+                    return null;
+                return (MembershipUser)_Values[ipos];
+            }
+        }
+
+        public IEnumerator GetEnumerator() {
+            return _Values.GetEnumerator();
+        }
+
+        public void SetReadOnly() {
+            if (_ReadOnly)
+                return;
+            _ReadOnly = true;
+            _Values = ArrayList.ReadOnly(_Values);
+        }
+
+        public void Clear() {
+            _Values.Clear();
+            _Indices.Clear();
+        }
+
+        public int Count { get { return _Values.Count; } }
+
+        public bool IsSynchronized { get { return false; } }
+
+        public object SyncRoot { get { return this; } }
+
+
+        void ICollection.CopyTo(Array array, int index) {
+            _Values.CopyTo(array, index);
+        }
+
+        public void CopyTo(MembershipUser[] array, int index) {
+            _Values.CopyTo(array, index);
+        }
+    }
+}