services.AddCors(option => option.AddPolicy("cors", policy => policy.AllowAnyHeader().AllowAnyMethod().AllowCredentials().WithOrigins(new[] { "http://localhost:5000" })));
app.UseCors("cors");
asp.net core 跨域
原文：https://www.cnblogs.com/buchizaodian/p/15007933.html
