// Creates an empty CompilerErrorCollection.
CompilerErrorCollection collection = new CompilerErrorCollection();            			

// Adds a CompilerError to the collection.
collection.Add( new CompilerError("Testfile.cs", 5, 10, "CS0001", "Example error text") );

// Adds an array of CompilerError objects to the collection.
CompilerError[] errors = { new CompilerError("Testfile.cs", 5, 10, "CS0001", "Example error text"), new CompilerError("Testfile.cs", 5, 10, "CS0001", "Example error text") };
collection.AddRange( errors );

// Adds a collection of CompilerError objects to the collection.
CompilerErrorCollection errorsCollection = new CompilerErrorCollection();
errorsCollection.Add( new CompilerError("Testfile.cs", 5, 10, "CS0001", "Example error text") );
errorsCollection.Add( new CompilerError("Testfile.cs", 5, 10, "CS0001", "Example error text") );
collection.AddRange( errorsCollection );

// Tests for the presence of a CompilerError in the 
// collection, and retrieves its index if it is found.
CompilerError testError = new CompilerError("Testfile.cs", 5, 10, "CS0001", "Example error text");
int itemIndex = -1;
if( collection.Contains( testError ) )
    itemIndex = collection.IndexOf( testError );

// Copies the contents of the collection, beginning at index 0, 
// to the specified CompilerError array.
// 'errors' is a CompilerError array.
collection.CopyTo( errors, 0 );

// Retrieves the count of the items in the collection.
int collectionCount = collection.Count;

// Inserts a CompilerError at index 0 of the collection.
collection.Insert( 0, new CompilerError("Testfile.cs", 5, 10, "CS0001", "Example error text") );

// Removes the specified CompilerError from the collection.
CompilerError error = new CompilerError("Testfile.cs", 5, 10, "CS0001", "Example error text");
collection.Remove( error );

// Removes the CompilerError at index 0.
collection.RemoveAt(0);