C#运行水晶报表出错

因为  APP.CONFIG文件 未添加  红色字体部分属性

<?xml version="1.0" encoding="utf-8" ?>

<configuration>

<configSections>

</configSections>

<connectionStrings>

<add name="Crystalreport.Properties.Settings.BMConnectionString"

connectionString="Data Source=.;Initial Catalog=BM;User ID=sa;Password=ccwen"

providerName="System.Data.SqlClient" />

</connectionStrings>

    <startup useLegacyV2RuntimeActivationPolicy="true">

</startup>

</configuration>