ArraySubsetEnumerator.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / CompMod / System / ComponentModel / ArraySubsetEnumerator.cs / 1 / ArraySubsetEnumerator.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.ComponentModel { 
 
    using System;
    using System.Collections; 
    using System.Diagnostics;
    using System.Security.Permissions;

    [HostProtection(SharedState = true)] 
    internal class ArraySubsetEnumerator : IEnumerator
    { 
 
        private Array array;
        private int total; 
        private int current;

        public ArraySubsetEnumerator(Array array, int count) {
            Debug.Assert(count == 0 || array != null, "if array is null, count should be 0"); 
            Debug.Assert(array == null || count <= array.Length, "Trying to enumerate more than the array contains");
            this.array = array; 
            this.total = count; 
            current = -1;
        } 

        public bool MoveNext() {
            if (current < total - 1) {
                current++; 
                return true;
            } 
            else { 
                return false;
            } 
        }

        public void Reset() {
            current = -1; 
        }
 
        public object Current { 
            get {
                if (current == -1) { 
                    throw new InvalidOperationException();
                }
                else {
                    return array.GetValue(current); 
                }
            } 
        } 
    }
}

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