Determines whether the 
ObservableDictionary<TKey,TValue> contains an element with the specified key.
 
            
            
            
            
            
            
            
            '宣言
 
Public Function ContainsKey( _
   ByVal  As  _
) As System.Boolean
             
        
            
            public System.bool ContainsKey( 
    
)
             
        
             
        
            パラメータ
- key
 
- The key to locate in the ObservableDictionary<TKey,TValue>.
 
            
            戻り値の型
true if the 
ObservableDictionary<TKey,TValue> contains an element with the key; otherwise, false.