C # string.Join usage

 

string.Join divided into the following five categories of usage have to explain.

HashSet<string> hs = new HashSet<string>();
hs.Add("111");
hs.Add("222");
hs.Add("333");
var str = string.Join(",", hs);
Console.WriteLine(str);

 

#region 
// Summary:
 // series member of the set wherein the specified separator between each member.
// Parameters:
 // Separator:
 // be used as string delimiter. Only elements having a plurality of values, separator was included in the returned string.
// values:
 // a collection that contains the object to be connected in series.
// type parameter:
 // T:
 // type values members.
// Returns:
 // A string of values consisting of members, the members separated in separator string. If no member of values, the method returns System.String.Empty.
// an exception:
 // T: System.ArgumentNullException:
 // values is null. 
[The ComVisible ( to false )]
 public  staticThe Join String <T> (String Separator, the IEnumerable <T> values);
 // 
// Summary:
 // tandem type configuration System.Collections.Generic.IEnumerable`1 member System.String set, wherein each member between the specified delimiters.
// 
// Parameters:
 // Separator:
 // be used as string delimiter. Only elements having a plurality of values, separator was included in the returned string.
// 
// values:
 // a collection that contains the string to be connected in series.
// 
// Returns:
 // A string of values consisting of members, the members separated in separator string. If no member of values, the method returns System.String.Empty.
// 
// anomaly:
 // T: System.ArgumentNullException:
 // values is null.
[The ComVisible ( to false )]
 public  static String the Join (String Separator, the IEnumerable <String> values);
 // 
// Summary:
 // series specified string array element, using the specified separator between each element.
// 
// Parameters:
 // Separator:
 // be used as string delimiter. Only when a plurality of elements having a separator, value was included in the returned string.
// 
// value:
 // An array that contains the elements you want to connect.
// 
// startIndex:
 // first element value to be used.
// 
// COUNT:
 // number of elements to be used for value.
// 
// Returns:
 //By the value of the string of the strings, the strings separated by separator string. - or - if System.String.Empty zero, COUNT
 // no element, or all of the elements of value and separator are value, compared with System.String.Empty.
// 
// anomaly:
 // T: System.ArgumentNullException:
 // value is null.
// 
// T: System.ArgumentOutOfRangeException:
 // startIndex or count is less than 0. - or - startIndex plus count value is greater than the number of elements.
// 
// T: System.OutOfMemoryException:
 // Out of memory. 
[SecuritySafeCritical]
 public  static String the Join (String Separator, String [] value, int startIndex, int COUNT);
 //
// Summary:
 // series string array of all the elements, wherein the specified separator between each element.
// 
// Parameters:
 // Separator:
 // be used as string delimiter. Only when a plurality of elements having a separator, value was included in the returned string.
// 
// value:
 // An array that contains the elements you want to connect.
// 
// Returns:
 // a string by the value of the elements, these elements separated by separator string. If the value is an empty array, the method returns System.String.Empty.
// 
// anomaly:
 // T: System.ArgumentNullException:
 // value is null. 
public  static String the Join (String Separator, the params String [] value);
 // 
// Summary:
// series of individual elements of an array of objects, using the specified separator between each element.
// 
// Parameters:
 // Separator:
 // be used as string delimiter. Only when the separator having a plurality of elements, values was included in the returned string.
// 
// values:
 // An array that contains the elements you want to connect.
// 
// Returns:
 // a string consisting of values of the elements, these elements are separated by separator string. If values is empty array, the method returns System.String.Empty.
// 
// anomaly:
 // T: System.ArgumentNullException:
 // values is null. 
[The ComVisible ( to false )]
 public  static String the Join (String Separator, the params  Object [] values);

 

Reproduced in: https: //www.cnblogs.com/wangjunguang/p/11122145.html