Using Entity Framework in C#, I get this error:
The entry 'AlMizanEntities' has already been added. (D:\\Document\\Almizan\\AlMizan\\C#\\AlMizan\\bin\\Debug\\AlMizan.vshost.exe.config line 7)
My code:
private void Fraz()
{
label1.Text = "Fraz ...";
Application.DoEvents();
AlMizanEntities1 ObjAE = new AlMizanEntities1();
}
public partial class AlMizanEntities1 : ObjectContext
{
/// <summary>
/// Initializes a new AlMizanEntities1 object using the connection string found in the 'AlMizanEntities1' section of the application configuration file.
/// </summary>
// *ERROR* occurs here
public AlMizanEntities1() : base("name=AlMizanEntities1", "AlMizanEntities1")
{
this.ContextOptions.LazyLoadingEnabled = true;
OnContextCreated();
}
/// <summary>
/// Initialize a new AlMizanEntities1 object.
/// </summary>
public AlMizanEntities1(string connectionString) : base(connectionString, "AlMizanEntities1")
{
this.ContextOptions.LazyLoadingEnabled = true;
OnContextCreated();
}
/// <summary>
/// Initialize a new AlMizanEntities1 object.
/// </summary>
public AlMizanEntities1(EntityConnection connection) : base(connection, "AlMizanEntities1")
{
this.ContextOptions.LazyLoadingEnabled = true;
OnContextCreated();
}
}
取出line 7
在D:\\Document\\Almizan\\AlMizan\\C#\\AlMizan\\App.config
或删除重复的行其他地方在该文件中。
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