What do you mean by CLR of Microsoft .NET framework?

• CLR stands for Common Language Runtime. 
• CLR is the component of the .NET Framework developed by Microsoft that allows you to compile and execute applications written in any language (i.e C#, VB) with .NET. 
• CLR provide the following service to the .NET programming environment:
  

• Exception Handling
• Garbage Collection
• Thread Management
• Memory Management
• Type Safety

CLR via C (4th Edition) (Developer Reference)