Delphi to C# Equivalances

--- Basic Datatypes ---
Delphi: Variant    			C#: object (with boxing)  
Delphi: Assert    			C#: System.Diagnostics.Debug.Assert


--- Form Management ---
Delphi: TForm.FormStyle = fsMDIForm	C#: Form.IsMDIContainer = true  
Delphi: TForm.FormStyle = fsMDIChild	C#: Form.MdiParent = ventanaPrincipal;  
Delphi: TControl.Align			C#: Control.Dock  
Delphi: TForm.ShowModal			C#: Form.ShowDialog()  
Delphi: Button1.Default := True    	C#: Form.AcceptButton = button1  
Delphi: TForm.ModalResult, TButton.ModalResult    C#: Form.DialogResult, Button.DialogResult  
Delphi: TButton.Click    		C#: Button.PerformClick()  
Delphi: TButton.OnClick    		C#: Button.Click
Delphi: Screen.ActiveForm    		C#: static Form.ActiveForm 
Delphi: Application.ExeName    		C#: System.Windows.Forms.Application.ExecutablePath  
Delphi: Application.OnException    	C#: Application.ThreadException  


--- Data Access ---
Delphi: TCustomConnection (and descendents)    C#: IDbConnection (and implementors)  
Delphi: TDataSetProvider    		C#: IDbDataAdapter (SqlDataAdapter, OleDbDataAdapter, etc)  
Delphi: TClientDataSet    		C#: DataSet, DataTable  
Delphi: TField    			C#: DataColumn  
Delphi: TField.Required = True    	C#: DataColumn.AllowDBNull = false  
Delphi: Variants.Null    		C#: System.DBNull.Value  


--- Component model ---
Delphi: procedure Loaded; override; 	C#: Implements ISupportInitialize  
Delphi: property X ... default 100;	C#: [DefaultValue(100)] int X { get; set; }  
Delphi: public property X: Y;		C#: [Browseable(false)] public Y X { get; set; }  
Delphi: TService (Service app.)		C#: System.ServiceProcess.ServiceBase