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Type parameters that aren't used are dead code, which can only distract and possibly confuse developers during maintenance. Therefore, unused type parameters should be removed.
Noncompliant Code Example

int <T> Add(int a, int b) // Noncompliant; <T> is ignored
{
  return a + b; 
}

Compliant Solution

int Add(int a, int b)
{
  return a + b; 
}