Can not Implicitly Convert SymmetrySecurityKey Type

Question

Plz any one help me i can't find the problem!!! Can not Implicitly Convert SymmetrySecurityKey Type

  var key = Encoding.ASCII.GetBytes(Configuration.GetSection("AppSettings:Token").Value);
            services.AddDbContext<DataContext>(x => x.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));
            services.AddMvc();
            services.AddCors();
            services.AddScoped<IAuthRepository, AuthRepository>();
            services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme).AddJwtBearer(options =>
            {
                options.TokenValidationParameters = new TokenValidationParameters
                {
                    ValidateIssuerSigningKey = true,
                    IssuerSigningKeys = new SymmetricSecurityKey(key),
                    ValidateIssuer = false,
                    ValidateAudience = false
                };
            });
        }

Answer 1

The error is essentially "Cannot convert from SymmetricSecurityKey(string) to IEnumerable<SymmetricSecurityKey>". This means that the IssuerSigningKeys is expecting an IEnumerable (List or Array) of SymmetricSecurityKey instead of a single value.

The fix is easy, give it an array:

services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme).AddJwtBearer(options =>
                {
                    options.TokenValidationParameters = new TokenValidationParameters
                    {
                        ValidateIssuerSigningKey = true,
                        IssuerSigningKeys = new[] { new SymmetricSecurityKey(key) },
                        ValidateIssuer = false,
                        ValidateAudience = false
                    };
                });