private CorsPolicy Allow(string origin)
        {
            var policyBuilder = new CorsPolicyBuilder();

            var policy = policyBuilder
                .WithOrigins(origin)
                .AllowAnyHeader()
                .AllowAnyMethod()
                .Build();

            return policy;
        }
        public void WithOrigins_AddsOrigins()
        {
            // Arrange
            var builder = new CorsPolicyBuilder();

            // Act
            builder.WithOrigins("http://example.com", "http://example2.com");

            // Assert
            var corsPolicy = builder.Build();
            Assert.False(corsPolicy.AllowAnyOrigin);
            Assert.Equal(new List<string>() { "http://example.com", "http://example2.com" }, corsPolicy.Origins);
        }