C# Error CS0576 – Namespace ‘{1}’ contains a definition conflicting with alias ‘{0}’

C# Error

CS0576 – Namespace ‘{1}’ contains a definition conflicting with alias ‘{0}’

Reason for the Error & Solution

Namespace ‘namespace’ contains a definition conflicting with alias ‘identifier’

An attempt was made to use the same namespace twice.

Example

The following sample generates CS0576:

// CS0576.cs  
using SysIO = System.IO;  
public class SysIO  
{  
   public void MyMethod() {}  
}  
  
public class Test  
{  
   public static void Main()  
   {  
      SysIO.Stream s;   // CS0576  
   }  
}