dotnet/src/webdriver/ICapabilities.cs

// <copyright file="ICapabilities.cs" company="WebDriver Committers">
// Licensed to the Software Freedom Conservancy (SFC) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The SFC licenses this file
// to you under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
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// </copyright>

using System;

namespace OpenQA.Selenium
{
    /// <summary>
    /// Capabilities of the browser that you are going to use
    /// </summary>
    public interface ICapabilities
    {
        /// <summary>
        /// Gets the capability value with the specified name.
        /// </summary>
        /// <param name="capabilityName">The name of the capability to get.</param>
        /// <returns>The value of the capability.</returns>
        /// <exception cref="ArgumentException">
        /// The specified capability name is not in the set of capabilities.
        /// </exception>
        object this[string capabilityName] { get; }

        /// <summary>
        /// Gets a value indicating whether the browser has a given capability.
        /// </summary>
        /// <param name="capability">The capability to get.</param>
        /// <returns>Returns <see langword="true"/> if the browser has the capability; otherwise, <see langword="false"/>.</returns>
        bool HasCapability(string capability);

        /// <summary>
        /// Gets a capability of the browser.
        /// </summary>
        /// <param name="capability">The capability to get.</param>
        /// <returns>An object associated with the capability, or <see langword="null"/>
        /// if the capability is not set on the browser.</returns>
        object GetCapability(string capability);
    }
}