1.ObjectDataProvider

          <ObjectDataProvider x:Key="odp" ObjectType="{x:Type local:Calculator}" MethodName="Add">   
              <ObjectDataProvider.MethodParameters>   
                  <system:String>0</system:String>   
                  <system:String>0</system:String>   
              </ObjectDataProvider.MethodParameters>   
          </ObjectDataProvider> 

     xmlns:system="clr-namespace:System;assembly=mscorlib"    

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