因用TypeScript时，NuGet没有jquery.json的声明文件下载，自己写了一个。分享一下。

interface JQueryStatic {    /**     * Converts the given argument into a JSON representation.     *     * @param o {Mixed} The json-serializable *thing* to be converted     *     * If an object has a toJSON prototype, that will be used to get the representation.     * Non-integer/string keys are skipped in the object, as are keys that point to a     * function.     *     */    toJSON(o: any): string;    /**     * Evaluates a given json string.     *     * @param str {String}     */    evalJSON(str: string): boolean;    /**     * Evals JSON in a way that is *more* secure.     *     * @param str {String}     */    secureEvalJSON(str: string): boolean;    /**     * Returns a string-repr of a string, escaping quotes intelligently.     * Mostly a support function for toJSON.     * Examples:     * >>> jQuery.quoteString('apple')     * "apple"     *     * >>> jQuery.quoteString('"Where are we going?", she asked.')     * "\"Where are we going?\", she asked."     */    quoteString(str: string): string;}