C#编程和Visual Studio使用技巧（上）

Console.WriteLine("My Tips On ,{0}C#", Environment.NewLine); 

using System.Web.UI.WebControls; 
 using MyGenericLibrary.UserControls; 
  
  /* Assuming that you had a Text Box control in both the namespace, 
   you would have to fully qualify the class object with the 
   complete namespace.To avoid that, you can use namespace alias. 
   Change as below */ 
   
 using System.Web.UI.WebControls; 
 using mc = MyGenericLibrary.UserControls; 
  
 /*and then use, /* 
 mc.TextBox textbox = new mc.TextBox(); 

public class MyClass 
 { 
   private string _id; 
     
   public string InternalID 
   { 
      get { return _id; } 
      set { _id = value; } 
   } 
 } 

[DebuggerBrowsable(DebuggerBrowsableState.Never)] 
 public class MyClass 
 { 
   private string _id; 
     
   public string InternalID 
   { 
      get { return _id; } 
      set { _id = value; } 
   } 
 } 

public class MyClass 
 { 
   [DebuggerDisplay("Value = {myVariable}")] 
   public string myVariable = "mydisplay"; 
 } 

if (e.Item.ItemType == ListItemType.Item ) 
 { 
   //Your code here. 
 } 

int myExpectedValueIfNull = 10; 
int expectedValue = myfunction() ?? myExpectedValueIfNull 

StringBuilder error Messages = new StringBuilder(); 
  try 
  { 
       DataSet dataSet1 = populateDataSet(1); 
  DataSet dataSet2 = populateDataSet(2); 
   
  dataset1.Merge(dataset2); 
            } 
            catch (System.Data.DataException de) 
            { 
   foreach (DataTable myTable in dataSet1.Tables) 
   { 
     foreach (DataRow myRow in myTable.GetErrors()) 
     { 
      foreach (DataColumn myColumn in myRow.GetColumnsInError()) 
      { 
        //loop through each column in the row that has caused the error 
        //during the bind and show it. 
         error Messages .Append(string.Format( 
         "Merge failed due to : {0}", myColumn.GetColumnError(myColumn))); 
      } 
     } 
   } 
           }