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    <p>If a method (instance or static) only references variables scoped within that method then it is thread safe because each thread has its own stack:</p> <p>In this instance, multiple threads could call <code>ThreadSafeMethod</code> concurrently without issue.</p> <pre><code>public class Thing { public int ThreadSafeMethod(string parameter1) { int number; // each thread will have its own variable for number. number = parameter1.Length; return number; } } </code></pre> <p>This is also true if the method calls other class method which only reference locally scoped variables:</p> <pre><code>public class Thing { public int ThreadSafeMethod(string parameter1) { int number; number = this.GetLength(parameter1); return number; } private int GetLength(string value) { int length = value.Length; return length; } } </code></pre> <p>If a method accesses any (object state) properties or fields (instance or static) then you need to use locks to ensure that the values are not modified by a different thread.</p> <pre><code>public class Thing { private string someValue; // all threads will read and write to this same field value public int NonThreadSafeMethod(string parameter1) { this.someValue = parameter1; int number; // Since access to someValue is not synchronised by the class, a separate thread // could have changed its value between this thread setting its value at the start // of the method and this line reading its value. number = this.someValue.Length; return number; } } </code></pre> <p>You should be aware that any parameters passed in to the method which are not either a struct or immutable could be mutated by another thread outside the scope of the method.</p> <p>To ensure proper concurrency you need to use locking.</p> <p>for further information see <a href="http://msdn.microsoft.com/en-us/library/c5kehkcz.aspx" rel="noreferrer">lock statement C# reference</a> and <a href="http://msdn.microsoft.com/en-us/library/system.threading.readerwriterlockslim.aspx" rel="noreferrer">ReadWriterLockSlim</a>. </p> <p><em>lock</em> is mostly useful for providing one at a time functionality, <br/> <code>ReadWriterLockSlim</code> is useful if you need multiple readers and single writers.</p>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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