JwtSecurityTokenHandler.ValidateToken 错误，XmlReader 定义在未引用的程序集中

Question

我正在实施 jwt 以包含在确认 email 中，供不是我的应用程序用户的人使用。 当我想验证令牌时，它会显示以下异常

XMLReader 类型是在未引用的程序集中定义的。 您必须引用程序集....

public static IEnumerable<Claim> GetTokenClaims(string token)
        {
            try
            {
                // get settings
                var secretKey = WebConfigurationManager.AppSettings["JWT.SecretToken"];
                var audience = WebConfigurationManager.AppSettings["JWT.Audience"];
                var issuer = WebConfigurationManager.AppSettings["JWT.Issuer"];
                var expireMinutes = WebConfigurationManager.AppSettings["JWT.ExpireMinutes"];
                var securityKey = new SymmetricSecurityKey(Encoding.Default.GetBytes(secretKey));

                var tokenHandler = new JwtSecurityTokenHandler();      
                var validationParameters = new TokenValidationParameters()
                {
                    ValidAudience = audience,
                    ValidIssuer = issuer,
                    ValidateLifetime = true,
                    ValidateIssuerSigningKey = true,
                    LifetimeValidator = LifetimeValidator,
                    IssuerSigningKey = securityKey
                };

                SecurityToken validatedToken;
                var principal = tokenHandler.ValidateToken(token, validationParameters, out validatedToken);
                return principal .Claims;

            }
            catch (Exception e)
            {
                throw e;
            }
        }