SQL data injection security

SQL Injection
.............\assignment
.............\..........\App_Code
.............\..........\........\ConnectionManager.cs
.............\..........\........\DataAccessLayer.cs
.............\..........\Default.aspx
.............\..........\Default.aspx.cs
.............\..........\SQLInjectionSafe.sln
.............\..........\SQLInjectionSafe.suo
.............\..........\SQLInjectionSafe.v12.suo
.............\..........\viewuser.aspx
.............\..........\viewuser.aspx.cs
.............\..........\web.config
.............\SQL assignment
.............\..............\SQLINWeb
.............\..............\........\App_Code
.............\..............\........\........\DB.cs
.............\..............\........\........\MailInfo.cs
.............\..............\........\App_Data
.............\..............\........\........\SQLINTest.mdf
.............\..............\........\........\SQLINTest_log.LDF
.............\..............\........\ForgetPassword.aspx
.............\..............\........\ForgetPassword.aspx.cs
.............\..............\........\Home.aspx
.............\..............\........\Home.aspx.cs
.............\..............\........\Login.aspx
.............\..............\........\Login.aspx.cs
.............\..............\........\web.config

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