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+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace System {
+
+ using System;
+ // The IComparable interface is implemented by classes that support an
+ // ordering of instances of the class. The ordering represented by
+ // IComparable can be used to sort arrays and collections of objects
+ // that implement the interface.
+ //
+[System.Runtime.InteropServices.ComVisible(true)]
+ public interface IComparable
+ {
+ // Interface does not need to be marked with the serializable attribute
+ // Compares this object to another object, returning an integer that
+ // indicates the relationship. An implementation of this method must return
+ // a value less than zero if this is less than object, zero
+ // if this is equal to object, or a value greater than zero
+ // if this is greater than object.
+ //
+ int CompareTo(Object obj);
+ }
+
+ // Generic version of IComparable.
+
+ public interface IComparable<in T>
+ {
+ // Interface does not need to be marked with the serializable attribute
+ // Compares this object to another object, returning an integer that
+ // indicates the relationship. An implementation of this method must return
+ // a value less than zero if this is less than object, zero
+ // if this is equal to object, or a value greater than zero
+ // if this is greater than object.
+ //
+ int CompareTo(T other);
+ }
+}