' Creates an empty CompilerErrorCollection.
Dim collection As 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.
Dim errors As CompilerError() = {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.
Dim errorsCollection As 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.
Dim testError As New CompilerError("Testfile.cs", 5, 10, "CS0001", "Example error text")
Dim itemIndex As Integer = -1
If collection.Contains(testError) Then
    itemIndex = collection.IndexOf(testError)
End If

' 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.
Dim collectionCount As Integer = 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.
Dim [error] As New CompilerError("Testfile.cs", 5, 10, "CS0001", "Example error text")
collection.Remove([error])

' Removes the CompilerError at index 0.
collection.RemoveAt(0)