BUG: The Visual C# .NET Implement Interface command does not implement different declarations with the same signature (811601)

MORE INFORMATION

1. Create a new Microsoft Visual C# .NET Console Application Project, and name the project TestApplication. By default, Class1.cs is created.
2. Replace the code of the Class1.cs with the following code:

   using System;
   
   namespace TestApplication
   {
   	interface I1
   	{
   		int Function1();
   	}
   	interface I2
   	{
   		int Function2();
   		float Function1();
   	}
   	class Class1:I1,I2
   	{
   		[STAThread]
   		static void Main(string[] args)
   		{
   			Console.WriteLine("Test Application");		
   		}
   	}
   }
   

   Class1 implements I1 and I2 interfaces.
3. On the View menu, click Class View.
4. Expand TestApplication, expand Class1, and then expand Bases and Interfaces. Interface I1 and Interface I2 are displayed.
5. To add implementation of Interface I1 to Class1, right-click Interface I1, point to Add, and then click Implement Interface.
6. To add implementation of Interface I2 to Class1, right-click Interface I2, point to Add, and then click Implement Interface. This only implements the Function2 function for Interface I2. The Function1 function for Interface I2 is not implemented.
7. On the Build menu, click Build Solution to compile the project. You receive the error message that is described in the "Symptoms" section of this article.
8. To build the project successfully, manually implement the missing function of Interface I2. To do this, add the following code to Class1:

   		float I2.Function1()
   		{
   			return 0;
   		}

9. Repeat step 8 to successfully build the project.