} 
 
  # 
  # NOTE: This procedure attempts to verify that an instance of .NET Core 
  #       and its associated runtimes are installed locally.  There are no 
  #       arguments.  The return value is non-zero if Mono appears to be 
  #       installed and available for use; otherwise, the return value is 
  #       zero. 
  #       arguments.  The return value is non-zero if .NET Core appears to 
  #       be installed and available for use; otherwise, the return value 
  #       is zero. 
  # 
  proc isDotNetCoreInstalled {} { 
    variable dotnetFileNameOnly 
    variable dotnetInstalledCommand 
    variable dotnetInstalledPattern